ViTables ChangeLog
==================
** February 09, 2011 **
Issues specific to Windows Vista have been reworked in the NSIS installer script.

** February 05, 2011 **
Fixed a minor issue (specific to Windows Vista) in the NSIS installer script.

** February 02, 2011 **
Fixed a minor issue in the NSIS installer script.

Fixed a minor issue in the setup.py module.

The Users' Guide has been updated.

Packaging procedure changed accordingly to recent changes in timeseries plugin.

** February 01, 2011 **
The timeseries and menu plugins have been enhanced.

** January 28, 2011 **
Fixed a bug introduced in the CSV plugin in r220.

** January 27, 2011 **
Fixed a bug in the initial configuration setup.

** January 26, 2011 **
Fixed a small drag & drop issue.

Python strings and Unicode strings have been revisited.

The Makefile file for building the MSWindows installer has changed.

** January 25, 2011 **
Several files (mainly example scripts) have been updated.

** January 24, 2011 **
Fixed a bug in the startup settings of ViTables.

** January 22, 2011 **
The process for building documentation has been refined.

** January 20, 2011 **
The copyright statement has been updated.

The setup.py script has changed.

Applied a workaround to a PyQt4 4.8.2 bug.

Fixed some minor bugs regarding plugins.

** January 18, 2011 **
Fixed some minor issues in the creation of the Windows installer.

** January 17, 2011 **
Fine tuning the building process of the Windows installer.

Updated several files required for building the Windows installer.

** December 18, 2010 **
More advances in the migration path to Python 3.0.

** December 11, 2010 **
More advances in the migration path to Python 3.0.

** December 09, 2010 **
String formatting is done via .format() method now.

** December 08, 2010 **
Moved to Python 2.6 :-) and preparing the migration path to Python 3.0.

** December 07, 2010 **
The project documentation has been updated. And now it is built via Sphinx.

** December 03, 2010 **
The node selection behavior of the tree of databases has been improved.

** December 01, 2010 **
Fixed some small problems in several files.

** November 30, 2010 **
Customised models have been debugged and fine tuned using modtest.py.

** November 28, 2010 **
The docstrings of the whole package have been updated.

** November 24, 2010 **
super() is used now in the ctor of all classes derived from PyQt4.

The csv plugin has been debugged and refactored.

** November 20, 2010 **
The module vtapp.py has been split into 2 modules.

** November 17, 2010 **
Qt properties of QActions set via keyword arguments at creation time.

** November 16, 2010 **
Some improvements applied to vtapp.py module.

Some small improvements have been made to several modules.

Several methods renamed to shorter names. Fixed a small bug.

Some minimal changes made to a several modules.

** November 15, 2010 **
Some improvements applied to the docBrowser subpackage.

The logger.py module has been refactored.

** November 14, 2010 **
All old-style signal/lot connections replaced with new-style connections.

** November 05, 2010 **
Several modules refactored. Code for querying tables has been debugged.

** November 04, 2010 **
The Preferences dialog has been debugged and refactored.

Signals and slots are connected via setUi method in several modules.

** November 03, 2010 **
The Preferences dialog has been improved.

** November 02, 2010 **
A couple of pure Python modules have been split in a Python part and a ui part.

** October 30, 2010 **
The utils.py module has been simplified.

Some unwanted directories have been removed from the repository.

Copyright statements updated in every source file.

The method used for dynamically load UI files has been simplified.

** October 26, 2010 **
Information about version number and copyright has been updated.

** December 29, 2009 **
Module nodePropDlg.py has been refactored and simplified.

Some code dealing with PyTables datatypes and numpy datatypes has been cleaned.

** December 28, 2009 **
Rows insertion/deletion in the tree view has been simplified and debugged.

** December 27, 2009 **
The import_csv and export_csv plugins have been improved.

** December 23, 2009 **
Inconsistencies in the spacing between lines have been fixed.

Tree view usability improved.

** December 21, 2009 **
Added the new plugins_menu.py plugin. It show info about the loaded plugins.

** December 20, 2009 **
The code dealing with application setup has been debugged and refactored.

** December 19, 2009 **
The plugins framework has been debugged and refactored and has a new ui.

** December 15, 2009 **
The deprecated (in Python 2.6) sets module is not used anymore.

** December 14, 2009 **
The code dealing with the tree view has been debugged and simplified.

** December 11, 2009 **
Fixed a subtle bug in the automatic sync between tree view pane and workspace.

** December 10, 2009 **
In the tree view fixed a bug in the cut node + paste node sequence.

** December 09, 2009 **
The logger module has been refactored and simplified.

Fixed a bug in the context menu of the logger.

Fixed a couple of minor bugs.

** December 05, 2009 **
The documentation browser subpackage has been simplified.

Several question like message boxes have been customised.

** December 04, 2009 **
Removed wild imports and other minor annoyances common to most modules.

The time series plugin has been refactored.

pluginsManager module has been refactored to improve some bizarre behavior.

Usability of csv_import plugin has been improved with better dialog texts.

** December 03, 2009 **
Autodetection of tables headers has been added to the import csv plugin.

** December 02, 2009 **
Support for tables headers has been added to the import/export csv plugins.

** November 30, 2009 **
The import_csv.py plugin has been debugged, refactored and enhanced.

** November 28, 2009 **
New version of import_csv.py plugin added to repository.

** November 25, 2009 **
Minor problems introduced in recent changes have been fixed.

** November 24, 2009 **
Import capabilities added to the CSV plugin.

vtapp.py module changed to make easier interaction with plugins.

** November 23, 2009 **
Layout of csv plugin changed to allow future additions; modules, icons,...

Plugin export_csv.py enhanced: better code, reduced memory footprint.

** November 22, 2009 **
Memory footprint greatly reduced.

** November 20, 2009 **
Fixed a bug in the datasheet.py module apparent with pyqt < 4.6.

** November 13, 2009 **
Support for queries has been updated.

dataSheet.py module has been refactored. 

leafView.py module has been refactored.

Plugins have been updated.

Querying functionality has been moved from vtapp.py to queriesManager.py.

dataSheet.py module has been refactored. Circular references have been removed.

Fixed a bug in the Preferences dialog.

** November 10, 2009 **
Fixed a bug in the Preferences dialog.

** November 08, 2009 **
Fixed a bug in the tree of databases that was not apparent in PyQt <=4.4.4.

The path of the config. file on Unix systems now adheres to the Qt standards.

** September 25, 2009 **
Fixed a minor bug in the code for opening files via drag and drop.

** September 22, 2009 **
Last improvements in the documentation style applied to Windows platforms.

Fixed an annoyance in the creation of PDF documentation.

** September 21, 2009 **
The User's Guide has been updated (and its custom layer has been recovered).

** September 20, 2009 **
Fixed a compatibility problem XP/Vista in the Windows installer.

** September 19, 2009 **
Applied several minor simplifications to styles management code.

** September 18, 2009 **
Windows installer upgraded for the next release.

** September 15, 2009 **
Fixed some minor bugs.

Prepare things for the next release.

** August 24, 2009 **
Some icons have been updated.

The zoomCell module has been debugged and refactored.

** August 22, 2009 **
The plugins framework has been debugged and its usability has been improved.

The time_series plugin has been debugged and refactored.

** August 21, 2009 **
The examples directory has been reworked.

** August 20, 2009 **
A couple of modules have been sanitised (bad variable names changed).

** August 15, 2009 **
The docBrowser package has been reworked a little bit.

Splash screen has been updated.

** August 13, 2009 **
Icons have been updated. About ViTables dialog enhanced with a Thanks To page.

Fixed a bug introduced when the use of Qt resources was dropped.

** August 07, 2009 **
Makefile files and other unneeded stuff have been removed.

** August 06, 2009 **
The plugins framework has been made more robust.

Fixed some small problems in the new build system.

** August 05, 2009 **
Last 2 commits backed out + Dima's patches merged + backed out commits restored

** July 29, 2009 **
Added support for packages to the plugins framework.

** July 28, 2009 **
A simple plugin framework has been implemented.

** July 21, 2009 **
The "Node properties" dialog is generated automatically (via Qt Designer) now.

** May 01, 2009 **
Added missing licensing information to several files.

Sources of Users Guide are now distributed in the ViTables tarball.

Procedure for generating the usersguide has been updated.

INSTALL.txt and setup.py have been updated.

HTML documentation uses utf-8 encoding now.

** March 11, 2009 **
Code for creating DBDoc objects was confusing and has been refactored.

Added a couple of (subtle) usability improvements.

** March 10, 2009 **
The Preferences subpackage has been updated.

Fixed a small bug in the "Select a file for opening" dialog.

** March 08, 2009 **
New utility function added to utils.py module.

Table queries are done in a separated execution thread now.

** March 05, 2009 **
The "New query" dialog is generated automatically (via Qt Designer) now.

** March 04, 2009 **
Some subpackages have been reorganised.

** March 02, 2009 **
__tr method has changed.

Attributes editing has been debugged and simplified.

Unneeded encoding/decoding of strings has been removed.

** March 01, 2009 **
The main menu bar has been reorganised.

** Feb 26, 2009 **
New feature added: export a dataset to plain text file with CSV format.

Fixed a unicode bug in the queries manager.

** Feb 24, 2009 **
The resources module has been added to the repository.

A couple of Makefile files have been changed.

** Feb 23, 2009 **
setup.py has been updated.

Code dealing with formatting time series has been refactored.

**Feb 21, 2009**
License files and license notes have been updated.

Fixed a little bug in the time_series plugin.

The examples foder has been reorganized.

Support for unicode filenames has been improved.

Fixed a silly bug in the time_series plugin.

Focus indicators for the logger and the tree panel have been improved.

The support for time series has been fixed and improved.

** Feb 11, 2009**
An ubiquitous misuse of the Python unicode() built-in has been fixed. 

The recent fix to the windows installer is now in the repository. 

** Jan 21, 2009**
	Fixed a bug in the support for unicode filenames in Windows.

	A better support for unicode filenames has been added.

** Jan 19, 2009**
	Fixed a small bug in the support for date/time.

** Jan 17, 2009**
	Date/time information is displayed now as legal time.

** Jan 16, 2009**
	Fixed a bug in the zoom cell feature.

** Jan 10, 2009**
	More improvements to installer for Windows.

	Fixed a serious bug in the installer for Windows.

** Jan 07, 2009**
	Code style of the vitables package has been improved.

** Jan 02, 2009**
	Code style of the h5db and docBrowser subpackages has been improved.

	Code style of the preferences, nodes and nodeProperties subpackages has been improved.

	Code style of the vtWidgets and vtTables subpackages has been improved.

** Jan 01, 2009**
	PyQt4 imports changed to remove unnecessary code verbosity.

** Dec 27, 2008**
	Fixed bug 014953.

	Strings are managed via unicode strings with utf-8 encoding.

** Dec 22, 2008**
	The User's Guide has been updated.

	Every str() call as been replaced by a unicode() call.

** Dec 19, 2008**
	Fixed a couple of minor problems.

	Fixed a bug that made impossible to open files by drag and drop in
	Windows.

	Fixed a bug introduced in the previous commit.

	The node copy/cut/paste mechanism has changed. Now it is much more efficient
	and simpler.

** Dec 18, 2008**
	The Copy Node operation  has been greatly optimized.

	Fixed an encoding related problem in the file opening procedure.

	Fixed a minor issue with the vertical header of large tables.

	The procedure for creating a Windows installer has been changed in order
	to deal properly with PyQt4.

** Dec 16, 2008**
	Fixed some bugs regarding portability between different platforms

** Dec 15, 2008**
	Fixed a problem in setup.py.

	Applied several simplifications derived from the use of Qt resources system.

	Fixed some bugs regarding portability between different platforms.

** Dec 13, 2008**
	Project clean-up and final changes.

** Dec 12, 2008**
	The preferences package has been refactored.

** Dec 11, 2008**
	Zooming cells with string content has been fixed.

	Fixed an annoying bug introduced in changeset 184e748db458.

** Dec 10, 2008**
	A context menu has been added to the workspace.

	The User's Manual has been updated.

	The documentation browser has been updated.

	The module in charge of application configuration has been updated.

	Fixed a small bug in the Properties dialog.

	Changed the trigger for in-place renaming of nodes in the tree of databases
	pane.

	The Properties dialog has been debugged and improved.

** Dec 09, 2008**
	ANNOUNCE.txt and setup.py have been updated.

	Fixed a bug in scripts/vitables.

	Fixed a small l10n problem.

** Dec 08, 2008**
	Fixed a small bug in insertion of nodes in the tree of databases pane.

** Dec 05, 2008**
	Fixed a subtle bug in the datasets access process.

	A small bug has been fixed.

	File Save As... operation has been debugged.

	Enhanced the render of datasets with just one row/column.

	Fixed a small bug in the synchronisation of the workspace with the tree of
	databases pane.

** Dec 04, 2008**
	A minor problem found in tables queries have been fixed.

	The content of just created filtered tables is now automatically displayed.

	Fixed a bug in the access to datasets with two or more dimensions.

	Nodes copying has been updated: leaves whose dataset is not readable are not
	copied

	Deletion of views tied to overwritten nodes has been implemented.

	The status bar is properly updated now when a node is renamed in the Tree of databases pane.

** Dec 03, 2008**
	The 'Recover last session' feature is fully implemented now.

	Fixed a small bug in the splash screen.

	Added a label in the status bar for displaying info about the node currently
	selected in the Tree of databases pane.

** Dec 02, 2008**
	Implemented the capability for zooming cell contents.

	Dynamic entries under the Windows menu are now checkable and exclusive.

** Nov 30, 2008**
	Fixed a bug in the navigation of huge datasets. Now displayed data is properly
	updated when a slider drag ends and when the table is wheeled.

** Nov 13, 2008 **
	Navigation of huge datasets is now fully implemented. Every navigation
	device (vertical scrollbar, keyboard and mouse wheel) seems to work fine and
	to update displayed data when a buffer fault occurs.

** Nov 04, 2008 **
	Navigability of huge datasets has been enhanced. The selected cell is now
	properly updated when a buffer fault occurs. It means that navigating the
	table with the keyboard works fine now.

** Oct 31, 2008 **
	Huge datasets can be displayed and navigated. Several things remain to be
	done (usability enhancements) but the feature seems usable and stable.

** Oct 24, 2008 **
	Opening files by dropping their icons in the databases tree panel is fully
	implemented.

	Some annoying problems that arised when nodes were moved around in the
	databases tree panel have been fixed.

	I've started to implement the support for huge datasets.

** Oct 23, 2008 **
	Opening files by dropping their icons in the databases tree panel has been
	partially implemented.

	Fixed a couple of bugs in the Properties dialog: data types are correctly
	shown now.

	In-place renaming of nodes has been debugged.

	Fixed a little problem with groups expansion in the tree view pane that was
	rather annoying: now pasting a node (or creating a new group) expands the
	parent group if it was closed. So user can see that the node has really been
	added.

** Oct 22, 2008 **
	More progresses in the datasets displaying:
	- the workspace and the tree of databases are synchronized now: if a leaf
		with a view is selected in the tree then the view becomes active in the
		workspace. And viceversa, if a view is activated in the workspace its leaf
		is automatically selected in the tree
	- when a node with views is overwritten (because a group has been created, a
		node has been renamed or a node has been pasted/dropped) the views are
		closed
	- the drag and drop behavior has been debugged

** Oct 21, 2008 **
	Fixed a bug in the application quitting process: the temporary database
	wasn't properly deleted.

** Oct 20, 2008 **
	The Windows menu has been reimplemented.

** Oct 19, 2008 **
	Datasets can now be displayed in the workspace. Still importants things
	remain to be done, mainly to add support for quickly navigate huge datasets.

** Oct 17, 2008 **
	The buffer.py module has been refactored and modified.

** Oct 16, 2008 **
	Fixed a bug in the node rename and file save as operations. A node/file
	cannot overwrite itself.

** Oct 13, 2008 **
	Fixed a subtle bug in the code for renaming nodes.

	Fixed a bug in the dialog for entering the name of a node when a group is
	being created or a node is being renamed: empty strings are not valid names
	now :-)

** Oct 11, 2008 **
	The code for renaming nodes has been refactored. Affected modules are
	vtapp.py, utils.py, inputNodeName.py and renameDlg.py.

	The setup.py has been updated.

** Sep 26, 2008 **
  Fixed some minor bugs regarding the enabled/disabled state of toolbar buttons
  and menu items.
  
  Added new module inputNodeName.py. It is used instead of renameDlg.py for
  creating groups and entering the initial name in renaming operations.

** Sep 25, 2008 **
  The behavior of the Open Recent File submenu is now a little bit more user
  friendly.

** Sep 24, 2008**
  Fixed a bug in the file opening procedure. Files with no PyTables/HDF5
  format are properly managed now.

  Some code in the vtapp.py module has been reorganized to make it more
  readable.

** Aug 02, 2008 **
  Fixed a couple of bugs in the File menu:

    * the Close All action wasn't enabled/disabled properly
    * the Save As... action didn't work

** Jul 23, 2008 **
  The porting of the nodeProperties subpackage has finished.

** Jul 21, 2008 **
  Merged r1054 and r1055 from trunk. Every modified file has been merged
  but VERSION.

** Jul 18, 2008 **
  The nodeProperties subpackage is being ported. At the moment the GUI
  part has been ported. Next step will be porting the code for attributes
  validation.

** Jul 15, 2008 ** 
  Fixed a nasty bug that crashed the application every time a node was
  expanded in the tree viewer. The reported Qt4 error was:

  QObject: Do not delete object during its event handling!

  I've been unable to locate exactly where the bug was. Apparently it was
  produced by a strange interaction between VTApp and VTGUI classes so
  I've embedded VTGUI in VTApp and removed the vtgui.py module. It seems
  to fix the bug.

** Jul 07, 2008 **
  The porting of the nodeProperties subpackage has started.

  A new module, nodeDoc.py, has been added. It is in charge of the
  information collection about a given PyTables node. This module makes
  unnecessary the following ones: nodeDoc.py, tableDoc.py, arrayDoc.py,
  unimplementedDoc.py and groupDoc.py. All those modules have been
  removed from the project.

** Jul 03, 2008 **
  The behavior of the Preferences dialog has been tuned.

** Jul 01, 2008 **
  The porting of the documentation browser has been done.

  The behavior of the documentation browser has been tuned.

** Jun 26, 2008 **
  Added svn:keyword property to dbsTreeModel.py leafNode.py
  nodeItemDelegate.py groupNode.py dbsTreeView.py rootGroupNode.py

** Apr 18, 2008 **
  Added contextual menus to the tree of databases view. Also a couple of
  menu items in the Help menu are working now.

  Functionality for configuring the application has been reimplemented.

** Apr 16, 2008 **
  Added code for enable/disable actions depending on the selected node
  in the tree of databases view.

** Apr 15, 2008 **
  Thre new icons have been added.

  Command 'Delete All Queries' has been reimplemented. The Query toolbar
  has been added.

  Tables queries have been reimplemented.

** Apr 11, 2008 **
  A couple of methods have been refactored and now have a new signature.
  Calls to these methods have been updated.

  The dbDoc.py module has been refactored.

  The nodeItemDelegate.py module has been moved to the h5db subpackage.

** Apr 08, 2008 **
  Added support for renaming nodes inplace.

  The code for node editing operations has been refactored.

** Apr 07, 2008 **
  Implemented Node --> Rename command with overwriting support.

** Apr 03, 2008 **
  Fixed a bug in the algorithm for recovering last session. Now if a
  given node doesn't exist then the application reports it and doesn't
  crash.

  Implemented Node --> New Group command with overwriting support.

** Apr 02, 2008 **
  The overwriting feature has been implemented in the drag and drop of
  nodes.

  Splash screen readability improved.

  Fixed a bug in DBDoc.pasteNode method of dbDoc.py module.

  The overwriting feature has been implemented in the Node Paste...
  command.

  The overwriting feature has been implemented in the File Save as...
  command.

  Added code for setting the application icon.

** Mar 31, 2008 **
  Processing command line fetaure has been ported.

  The last session recovering feature has been ported.

** Mar 28, 2008 **
  Splash screen module has been debugged: now messages are drawn at the
  proper position.

  The following files have been updated: INSTALL.txt, README.txt,
  setup.py and Makefile.

  Version number has changed to 2.0.

  A note has been attached to the start of every source file of ViTables.
  In this note it is  specified how the ViTables program is licensed.

** Mar 27, 2008 **
  Copyright statement of source files has been updated.

  ViTables logo has changed: now it doesn't contain the Carabos logo.
  I've done this because now ViTables is not developed by Carabos Coop.
  V.. Instead it is a free software project maintained by myself.

  The ViTables source code license has changed. From now on it has a
  GPLv3 license.

** Mar 26, 2008 **
  Creating a branche for porting ViTables to PyQt4.

  Fixed a little problem in the drag and drop support of the tree of
  databases  model/view.

  The treeEditor subpackage has been removed.

  The functionality of the File menu has been implemented. Only
  overwritting files during a File --> Save as... operation remains
  unimplemented.

  Fixed a couple of bugs in the tree of databases model:
  - the close database operation didn't remove the node from the tree
    view.
  - when opening a database fails the returned value was no specified.

  The configuration module has been rewritten.

  The configuration module has been rewritten.

  Small changes introduced in several modules: the name of some
  attributes has changed and some imports have been slightly modified.

  Small changes introduced in several modules: the name of some
  attributes has changed and some imports have been slightly modified.

** Mar 20, 2008 **
  The vtgui.py module has been refactored and some small problems have
  been fixed: the size of the toolbars icons, the WhatsThis action
  setup, and the setup of the menu with entries for the toolbars.

  The vtgui.py module porting is done. The result is a module much
  shorter and clearer thant it was before.

** Mar 19, 2008 **
  The porting of the vtgui.py module has started. It has been greatly
  simplified.

  The drag and drop behavior of the tree of databases view has been
  debugged a little bit.

  PyQt4.QtXXX libraries are now imported as QtCore and QtGui instead of
  qtCore and qtGui. In addition a couple of modules have some minor
  changes.

** Mar 18, 2008 **
  Copy, cut, paste and delete operations have been implemented in the
  tree of databases model. Overwriting has not been considered yet.

** Mar 05, 2008 **
  Basic drag and drop of the tree of databases model/view works!
  Nodes can be moved from one location to another (even in a different
  file). Nodes that belong to files opened in read-only mode cannot be
  dragged. Lazy population of the model works fine too.

** Mar 03, 2008 **
  The basic model/view implementation for the tree of opened databases
  is done. Databases can be opened and closed. The object tree of a
  given database is populated in a lazy way so that performance is
  guaranteed when opening files with a large number of nodes. Finally,
  icons are tied to nodes in the tree view.

** Feb 29, 2008 **
  Drag and drop support is being implemented.

** Feb 27, 2008 **
  Added basic support for renaming nodes in-place.

** Feb 26, 2008 **
  Added support for custom context menus to the tree of databases view.

  Some modules have been changed in order to keep internal consistency.

  Minor modifications made in several modules.

** Feb 22, 2008 **
  The h5db subpackage has been updated. Calls to Qt3 methods have been
  moved to Qt4 equivalent methods.

  nodes subpackage has been updated. Calls to Qt3 methods has been
  replaced by calls to Qt4 methods.

** Feb 20, 2008 **
  createIcons function changed: removed a line that was commented out.

  The nodes subpackage migration has started. Calls to Qt
  functions/methods have been adapted to Qt4.

** Feb 18, 2008 **
  The following modules have been ported:

  * scripts/vitables
  * vitables/utils.py
  * vitables/vtsplash.py
  * vitables/vtSite.py
  * vitables/vtgui.py 
    This module has been split in two modules: logger class is defined
    in a new module now.
  * vitables/logger.py

  The whole preferences subpackage has been ported:
  * vitables/preferences/vtconfig.py
  * vitables/preferences/preferences.py
  * vitables/preferences/configException.py

  The following tests have been ported:
  * vitables/preferences/preferencesGUI.py
  * tests/preferences/test_vtconfig.py
  * tests/preferences/test_preferences.py

** Dec 16, 2007 **
  The Spanish translation has been updated.

  WhatsThis help texts and some About... texts have been reformatted in
  order to improve the code readability.

** Dec 14, 2007 **
  The previous bug fix in the editing of the TITLE system attribute was
  incomplete. It has been corrected now (hopefuly).

** Dec 13, 2007 **
  Fixed a bug in the editing of the TITLE system attribute (accents
  raised errors).

  Some trivial enhancements have been done.

  The editing of user attributes has been improved. Overflow cases are
  now properly detected and a ValueError is raised. Although this is not
  the default behavior of numpy arrays (which are silently converted to
  the apropriate dtype when an overflow occurs) it seems more adequated
  for an end user application as ViTables.

** Nov 29, 2007**
  Drag and drop of nodes has been debugged. Cut and paste has been improved.
  I hope that editing nodes is now implemented in a quite robust way.

** Nov 28, 2007**
  The behaviour of the documentation browser has been improved.
  A couple of bugs have been fixed:
  - canceling the Open File... command works fine now
  - opening a new documentation browser doesn't give errors due to not found
    documents
  - trying to open a document that doesn't exist don't shows a blank page but a
    page with the message 'Document Not found'

  A mess due to the use of backslashes still happened on Windows platforms,
  specially in the list of recent files and in the navigation browser history
  and	bookmarks. This problem has been hopefully solved.

  The copy and paste operation has been enhanced. Now a node can be copied and
  pasted in its parent group. The overwrite dialog is raised, giving you the
  chance to rename the pasted node. If you decide to overwrite, the operation
  fails (a PyTable exception is raised) because a node cannot be overwritten
  by itself.


** Nov 27, 2007**
  The template script that generates the Windows installer has been updated.
  Now it takes care of the available translations.

  Unittests have been updated.

  The search method for locating the application settings has been improved on
  Mac OS X platforms.


** Nov 26, 2007**
  Spanish translation added.

  A couple of minor problems have been fixed:
  - the .vitables directory is not created on Mac OS X platforms anymore
  - the message raised when a directory is dropped on the tree viewer is now
    clearer

  The User's Guide has been updated.


** Nov 23, 2007**
  Displaying of objects in tables widgets has been enhanced. Now cell contents
  are dynamically adapted to the available room. It means that how the content
  of a given cell is displayed depends on the column width. As a consequence,
  the displaying of multidimensional objects has been greatly improved.

  Some changes aimed to improve the i18n have been done.


** Nov 21, 2007**
  Fixed a bug in the creation of user attributes with dtype float32.

  Errors raised during user attributes editing are displayed in the attributes
  editing dialog, not in the logger. This make easier to user to realise that
  an error has been raised.


** Nov 19, 2007**
  The release version has been updated.

  The User's Guide source has been updated.

  The DocBrowser behavior has been enhanced. Opening a file for the very first
  time in the DocBrowser uses the home directory as a working directory.
  Before it used the installation directory which was ugly.


** Nov 02, 2007**
  Fixed a bug in the access to VLArrays elements. The bug avoided the creation
  of views for VLArrays.

  VERSION has been updated in vtSite.py. This is required in order to run
  properly on Mac OS X platforms because on these platforms the module is NOT
  overwritten by setup.py.

  The temporary database is not removed when quitting ViTables because on
  Windows platforms a Permission denied error is raised.


**Oct 31, 2007**
  Explicit support for addressing 64 bit space has been added. Now ViTables
  can display tables with more than 2**32 rows with no problem.

  A small bug has been fixed (hopefully) in the node paste operation: pasting
  a node on an expanded group doesn't refresh the object tree i.e. the pasted
  node is not visible.

  The whole unittest directory has been updated/refactored/debugged.

  I forgot to update tests/test_all.py in the previous commit :-(

  Fixed a small bug in the File Save As... procedure. The file extension of
  the new file was generated in a wrong way because the full filepath was used
  to determine the extension. The right thing is to use the filename.

**Oct 30, 2007**
  The Users' Guide has been updated.

  A specific icons has been given to the toobar button in charge of opening
  files so that users can appreciate that it can show a popup menu now.

  Fixed a bug in File --> Close All and Query --> Delete All. Closing a set of
  non selected nodes caused a wrong update of the QAction in charge of
  closing all open files. Deleting a set of non selected filtered tables
  caused a wrong update of the QAction in charge of deleting all filtered
  tables.

  Fixed a bug in the procedure used to close a database. A race condition has
  been removed.

  A new icon has been added.

  Fixed a bug in the updating of query QActions. The bug couldn't be
  appreciated by users because it happened when the application was about to
  exit.

**Oct 26, 2007**
  The VERSION file has been updated.

  A new usability enhancement has been added. The Open button of the File
  toolbar is able now to open the file of Recent files too.

**Oct 22, 2007**
  Fixed a bug in the initial setup of the application.

  Fixed a bug in the Properties dialog of empty groups.

  Creating and renaming node operations have been made more robust.

  Fixed a small problem of name qualification when accessing to a couple of
  PyQt attributes.

**Oct 19, 2007**
  Usability of Properties dialog has been improved by fixing the visual
  behavior of attributes editing.

  The format given to catched errors has changed again. Now the readability of
  Syntax Errors is better.

  In the Filter Table dialog ValueErrors are explicitely catched now.

**Oct 18, 2007**
  Some classes still were instantiated via apply(qt.QSomeWidget.__init__,
  (self,args)). Now qt.QSomeWidget.__init__(self, args) is used.

  The behavior of tables shown in the Properties dialog has been improved.
  Tables have been resized so that they occupy all the available horizontal
  space leaving no (anoying) gaps.

**Oct 17, 2007**
  Fixed a small bug in the console that produced a wrong color update in some
  situations.

  Wild imports have been completely removed.

  The examples directory has been updated.

**Oct 16, 2007**
  The management of application preferences and configuration has been
  improved. The code has been simplified and a small bug has been fixed.

  Fixed a bug in the Preferences dialog that made the Cancel button useless.

  Some error and warning messages have been changed in order to ensure that all
  of them have a consistent format.

**Oct 15, 2007**
  The resize mode of the Tree Viewer widget has been fixed so that the widget's
  header resizes properly its sections when the widget is resized.

  A subtle bug has been fixed in the setup of the default configuration of the
  application.

**Oct 11, 2007**
  Some logger messatges have been changed in order to make them
  self-explanatories.

  The installer template script has been modified. The name of the installer
  includes the kind of license now.

  Fixed a small bug in the File Save As... command. It avoided open files
  overwriting on Windows platforms.

  The format used for display catched exceptions has changed. Now it is more
  readable (although provides less information).

**Oct 10, 2007**
  The format of docstrings has been updated. Now every docstring has a
  restructured text format.

  Docstrings of every module have been updated. In particular the updated
  sections are those that listed the names of classes, methods, functions and
  global variables contained in the modules.

  Code for moving a node from one location to a different one has been changed
  in order to improve the performance.

**Oct 04, 2007**
  Fixed a bug in the paste node procedure.

**Oct 03, 2007**
  The behavior of the Query results node of the tree view has been setup
  accordingly to its aim.

  A subtle bug has been fixed in the dbView.py module. When dealing with
  nodepaths os.path.join should be avoided in favour of tables.utils.joinPath.
  The reason: in Windows platforms os.path.join can produce paths with a mix of
  slashes and backslashes.

  A small bug in the template installer script has been fixed. The uninstaller
  didn't remove completely the ViTables entry from the Start menu.

  Fixed a bug in the opening file process. When the open file dialog was
  called for the first time (i.e. application startup) and the dialog was
  cancelled then later calls of this dialog were unusable.

  The procedure for saving a file with a different name has been slightly
  changed to avoid a nasty HDF5 error. The error was raised when the new file
  name was filename (with no extension) and a filename.h5 file already existed.

**Oct 02, 2007**
  As no evaluation versions are going to be distributed the dbManager template
  is not needed now. That's why it has been renamed to dbManager.py

  Unneeded and obsolete files have been removed.

  A small bug has been fixed in vitables/nodes/leafView.py. The bug was raised
  by a bug in the underlying PyTables 2.0.1

  The ViTables configuration has been updated. The Startup option `start in
  current directory` is now `start in home directory` to avoid opening
  unexpected directories in Windows and Mac OS X when ViTables is launched by
  double clicking its desktop icon.

  Fixed a small bug that prevented to start ViTables in the home directory
  (when configured to do it) in Windows platforms.

  The template script for generating installers has been modified to add more
  items to the Start menu: links to documentation (in both PDF and HTML4
  formats) and to the examples directory.

**Oct 01, 2007**
  The users' guide has been updated.

  A check has been added to several methods in vtapp.py, to ensure that
  filepaths do not contain backslashes because they produce a real mess in the
  Windows registry and the list of recent files.

**Sep 30, 2007**
  Added a button for group creation to the Node toolbar.

**Sep 29, 2007**
  Fixed a bug in the drag and drop of a node from a read-only file to a
  read-write one.

**Sep 28, 2007**
  QActions updating and synchronizating panels strikes back!
  The last approache has been discarded because it didn't encompass every
  possible case. The new approache seems to work better and it is simpler.

  Fixed a bug that prevented empty nodes to be added to the object tree when
  the tree was expanded.

  Fixed a bug in the creation of new groups. Now the new group can overwrite
  any node with the same name placed in its parent group. Before only groups
  could be overwriten.

**Sep 27, 2007**
  The Help Browser history and bookmarks are now stored in the configuration
  file instead of in their own files.

  Fixed a bug in the updating of the QActions state.

**Sep 26, 2007**
  The list of recent files is now stored in the configuration file (or in the
  Windows registry) instead of in its own file.

  The last session is now stored in the configuration file (or in the
  Windows registry) instead of in its own file.

  unittests have been updated.

**Sep 25, 2007**
  The configuration file lastdir, used to store the last opened directory has
  been removed. Now this information is stored in the application configuration
  file (or in the Windows registry).

**Sep 24, 2007**
  Fixed a small bug in the recovering last session process.

**Sep 23, 2007**
  Unittests have been updated.

**Sep 22, 2007**
  Added a new usability improvement: the tree view pane and the workspace keep
  now their selection state synchronized.

  Several keyboard accelerators added.

**Sep 21, 2007**
  A couple of small usability improvements has been added. The action
  Node-->New group has a keyboard accelerator now.

**Sep 20, 2007**
  The dialog raised when a node editing leads to a naming problem is now more
  readable a.k.a useful.

  Added permission to create groups under the Query results root node.

  Fixed a bug that appeared when a node was moved from one file to a different
  one.

  Fixed a bug that appeared when a node was copied from one file and pasted
  into a different one.

**Sep 18, 2007**
  A small bug has been fixed in the renameDlg.py module.

  Fixed a bug in the implementation of tables queries. The bug caused wrong
  values to be displayed in the query indices field (if requested) when the
  range of rows to be queried was other than (start=1, stop=n, step=1)..

**Sep 17, 2007**
  A small bug has been fixed in the dbView.py module.

  The unittests under tests/h5db have been updated.

**Sep 13, 2007**
  The dialog raised when a naming problem appears has been enhanced. Now,
  detailed information about the operation being executed is displayed and
  buttons text is self-explanatory.

  Fixed a small bug that affected the File Save as... operation.

  Added support for overwriting nodes when a new group is being created.

  Docstrings of dbMananger_template have been updated.

  Fixed a small bug in renameDlg.py.

**Aug 09, 2007**
  Fixed a serious bug in node deletions procedure.

**Aug 08, 2007**
  New, clearer descriptions are used in the Properties dialog, in help texts
  and in buttons text.

  Unneeded messages are not passed to the logger anymore.

  Management of filenames extensions has been improved.

  The Query menu has been simplified.

  The HelpBrowser toolbar layout has changed. It is clearer now.

**Aug 03, 2007**
  All unittest modules have been refactored and debugged.

  __init__.py files have been added to the tests directory and its
  subdirectories.

  test_all.py module has been added so that all unittests can be executed
  easily.

  testingHOWTO.txt has been updated and moved to the tests directory.

**Jul 31, 2007**
  Unittest module test_query.py has been added.

  The tables query implementation has been modified in order to make it more
  suitable for testing it with unittests.

  Fixed a bug that was hitting every module in the tests/nodes directory.

  Unittests in the tests/preferences directory have been updated.

  Unittest module root_package/test_commandLine.py updated.

**Jul 25, 2007**
  Updated Mac packaging instructions to avoid linking sip/PyQt against wrong
  Python.

**Jul 24, 2007**

  INSTALL.txt and ChangeLog.txt have been updated.

  VTApp.slotHelpAbout method changed. The info displayed in the About tab has
  been updated.

  Support for VLArrays has been enhanced. VLArrays with pseudo-atom of kind
  vlunicode are now supported.

  Module zoomCell.py has been updated accordingly to the recoded cell
  formatting methods of utils.py

**Jul 23, 2007**

  Use a `make.sh` script instead of `make` to build Mac OS X DMG images.
  The process is not complete yet, since the license is not shown on opening
  the DMG image.  That's why the `SLA.*` files are still in place.

  Makefile_windows and the template NSIS installer script have been updated.
  Now they take care of the LICENSE.html file.

  Makefile for unix has been simplified.

  Added RTF readme to DMG image with important details for Mac OS X.

  Removed the files for the Mac OS X DMG resource fork.

  The license file in the DMG root is enough and easier to place. ;)

  The Linux packaging system has been updated so that licenses are properly
  managed.

**Jul 21, 2007**
  Fix the Mac OS X app not finding the `qt.so` extension in the appdir.
  Thanks to Doug Anderson from the PythonMac-SIG list for the solution.

**July 19, 2007**
  Added a bunch of tests for testing that the actions of menu items if File,
  Node and Query menus are properly enabled/disabled depending on the kind and
  number of selected nodes in the tree viewer.

**July 12, 2007**
  The way of saving settings in the windows registry has changed. Now settings
  are stored under the key Carabos/Vitables/Version/PythonXX. No changes have
  been introduced for Unix and Mac OS X platforms.

  The management of application settings has been improved. Some annoyances
  regarding the geometry of the main window and viewer panels have been fixed.

**July 06, 2007**
  Module subprocess.py has been removed. Since no packages for Python 2.3 are
  built now the module is not required.

  Bug fixed in scripts/vitables. The order of the import sentences was wrong.

**July 03, 2007**
  Screenshots for the User's Guide have been updated.

  Support for personal and site licenses has been added.

**July 02, 2007**
  Makefile_windows slightly modified to ensure that del behaves like rm.

  hpViewport.py module has been changed in order to fix the speed problem
  hitting PyQt >=3.16.

  The PNG file vitables_wm.png has changed. It has been converted from RGB to
  indexed mode. This way transparency is properly handled in Windows boxes.

**June 28, 2007**
  The 3rd_party_licenses directory has been removed. The MANIFEST.in,
  LICENSE.txt and utils.py files have been modified accordingly.

  The User's Guide includes now a copyright notice for Qt and PyQt.

**June 27, 2007**
  Package Mac OS X app as a semi-standalone application (incomplete).

  The PNG used in ViTables windows as application icon has been updated.

  References to the evaluation version have been removed from ANNOUNCE.txt and
  README.txt.

**June 25, 2007**
  The docBrowser subpackage has been refactored and debugged.

  The script used to generate the treeSymbols.png image has been updated. The
  icon for compressed arrays has been included in the script. The image
  treeSymbols.png itself has been updated too.

  The xml source of the User's Guide has been updated.

**June 20, 2007**
  The mingwm10.dll library must be included in the installed ViTables because
  qt and pyqt have been compiled dinamically with the MinGW compiler. The
  Makefile mswindows/Makefile_windows and the template NSIS script
  mswindows/vitables.nsi.in have been modified to take care of this dependency.

**June 15, 2007**
  Added a Confirm Uninstall page to the template NSIS script.

  Several changes intended to allow for generating user's guide in a Windows
  box have been introduced.

**June 14, 2007**
  A small inconsistency in the ViTables behavior has been fixed: files are now
  open in read-write mode by default.

  The template NSIS script for the Windows installer has been updated and
  refactored.

**June 13, 2007**
  A working version of the new Windows installer is ready. Refactoring will
  start in brief :-)

**May 29, 2007**
  A new set of unittests has been added to the h5db subpackage.

**May 27, 2007**
  Some minor changes introduced in the h5db subpackage.

**May 26, 2007**
  Unittests for the h5db subpackage has been refactored and debugged.

**May 24, 2007**
  Unittests for the h5db subpackage has been rewritten from scratch.

**May 21, 2007**
  The Windows installer making process is being updated. Compilation is done
  with MinGW.

**May 18, 2007**
  The Properties dialog for files has been slightly enhanced: the access mode
  is shown now in the database groupbox.

  A small bug has been fixed in the dataspace groupbox. The bug produced bad
  dataspace groupboxes when the number of children of the group was zero.

  Class NodeDoc and its descendants have a new, simpler signature.

  The preferences subpackage has been slightly refactored.

  Unittests are being updated.

**May 17, 2007**
  The operations Node Rename and File Save as... have been enhanced and
  debugged.

  The dialogs involved in node renaming and file saving have been modified to
  make them more suitable for the new behavior of those operations.

**May 15, 2007**
  The File Save as... operation has been refactored.

  We have got rid of the `h5file` attribute of root nodes in the tree view
  pane. It is not needed anymore due to the recent changes in the code.

  We have got rid of the parent widget argument in most of the application
  dialog ctors because this widget uses to be the application main widget,
  which is always accessible through the qt.qApp.mainWidget method.

**May 14, 2007**
  The methods for iterating over tree views have been refactored.

  The mechanism for querying tables has been refactored and reorganized. Some
  modules have moved to different locations, some methods have moved to
  different modules, etc. The result is much more consistent than the previous
  implementation.

  Functionality provided by the xxxEditor modules of the treeEditor subpackage
  has been moved to other modules. The xxxEditor modules have been removed from
  the project.

**May 12, 2007**
  Fixed an annoying bug that produced lots of error messages when a new
  database was created/open. It was caused by a bad interaction between
  VTApp.slotUpdateActions and DBManager.openDB methods.

  Several internal operations have been simplified. The code of the whole
  application is now clearer.

**May 11, 2007**
  The utils.py module has changed. The function getNode has been moved to
  dbDoc.py module. Several modules are affected by this change.

  A bug has been fixed in the NodeDoc.move method. The bug caused that views of
  small tables werent properly displayed after a drag and drop operation.

  The way of accessing the DBDoc instance tied to a given item of the tree view
  item (i.e tied to a TreeNode instance) has been simplified.

**May 10, 2007**
  Node editing reimplementation has finished. After a new refactorisation
  everything seems to work fine now.

**May 09, 2007**
  Drag and drop of nodes has been reimplemented. Now it takes care of properly
  overwriting nodes and updating views.

**May 08, 2007**
  Node editing refactoring is still on. Delete and paste operations have been
  reimplemented.

**May 05, 2007**
  The mechanism for renaming and deleting nodes has been enhanced and debugged.

  A translate method has been added to some modules that (due to recent
  changes) need it now.

  The mechanism for cutting and copying nodes has been reimplemented. Now it is
  simpler and more stable.

**May 04, 2007**
  The coupling between leavesManager.py and dbManager.py modules has been
  removed.

  Started a heavy refactorisation of the treeEditor subpackage.

  The group creation and renaming of tree view items in-place have been
  completely recoded.

**May 02, 2007**
  Fixed a bug in node deletion: deleting a group with views didn't close the
  views.

  Module nameConflictDlg.py strongly refactored.

**Apr 30, 2007**
  Drag and drop management is now simpler:
    we have got rid of the nodeDrag module
    information about drags is now encoded via QTextDrag method

**Apr 27, 2007**
  Some methods of treeView module have been moved to the utils module.

  The vtInputBox module has a changed. Now it can be called more easily and
  used in a more consistent way.

  The implementation of the model-view-controller in the leaves manager has
  been fixed for renaming and dropping operations. Some minor changes have
  been done to descendants of NodeDoc class.

**Apr 23, 2007**
  The queries management has been enhanced in several ways. On the one hand
  performance of the filling of the result table has been increased when a
  column for selected indices is required by user. On the other hand usability
  of the query dialog has been improved in some aspects.

**Apr 20, 2007**
  Added a help system to the user's attributes page of the node properties
  dialog. Also the query dialog has been enhanced with a help system.

  The splash screen has been updated.

  Management of configuration exceptions has been simplified by reducing the
  number of classes to deal with.

**Apr 19, 2007**
  The support for complex queries has been enhanced. Now columns whose names
  contain blanks can be queried too.

**Apr 18, 2007**
  The preferences subpackage has been refactored and simplified.

**Apr 15, 2007**
  Added support for complex queries.

**Apr 14, 2007**
  A couple of bugs have been fixed:

  - the action Close view is inactive when the selected item is a group.
    However there was a LeavesManager.closeGroup method designed for closing
    every opened view under the selected group when the Close view action was
    launched.

  - the icons dictionary was recreated every time an icon was required by the
    application. It caused the openRecentFile action not to work at all. On the
    other hand the nodeProperties subpackage has been refactored and
    simplified.

**Apr 11, 2007**
  The nodes subpackage has been refactored and simplified.

**Apr 10, 2007**
  The h5db subpackage has been refactored and simplified.

**Apr 09, 2007**
  The application exiting code has been refactored.
  Applied a workaround to a bug that hangs the application during the quit
  process: calls to methods Table.where and Table.whereAppend have been
  replaced by calls to Table.readWhere.

**Apr 07, 2007**
  The queryDlg.py module has been heavily refactored.

**Apr 06, 2007**
  The management of tables queries is still under revision.

**Apr 03, 2007**
  The tables query syntax has changed in PyTables 2.0. Methods involved in
  querying tables have been updated.

**Mar 31, 2007**
  The module resources.py has been renamed to utils.py.

**Mar 30, 2007**
  Management of the application icons have been simplified.

**Mar 29, 2007**
  The code for opening a node from the tree view has been refactored and
  simplified.

  Management of empty datasets has been improved.

**Mar 28, 2007**
  Added support for CArrays. Until now CArrays were managed as regular Arrays:
  they shared the same icon and looked the same in Properties dialogs. Now an
  icon has been created for CArrays and they are explicitely identified in
  Properties dialogs.

  The attributes editing stuff have been refactored and simplified.

**Mar 27, 2007**
  The editing code of the TITLE system attribute has been simplified.

  The directory vtBoxes has been renamed to vtWidgets. It is aimed to contain
  widgets specifically designed for ViTables and widely used for it. The
  following modules have been moved to this directory:

  - zoomCell.py
  - vtTableItem.py

**Mar 26, 2007**
  The VTTableItem class has been refactored.

  The getNodeInfo method has been changed in classes derived from NodeDoc.
  As a consequence a more convenient way to access the info returned by this
  method is achieved. It means that the code that use the returned info is now
  simpler. Several modules are affected by this change.

  The copyright line at top section of every python module of the project has
  been updated.

  The General page of the Properties dialog has been slightly refactored.

**Mar 24, 2007**
  Most of calls to vitables.resources.getAttr have been changed. The simpler
  form, object.attribute, is preferred unless the attribute name is stored in
  a variable. In this case only the first form can be used. A bunch of modules
  is affected by these changes.

  vitables.resources.getNode function rewritten.

  The methods for dinamically building the object tree (tree view) of a given
  database have been refactored and greatly simplified.

  zoomCell.py module refactored.

  The management of empty databases has been debugged.

  Fixed a bugg in the management of UnImplemented datasets.

**Mar 23, 2007**
  In PyTables 2.0 some Table attributes have been renamed, other have
  disappeared and other have been added. In order to see if a Table has nested
  field the colnames attribute cannot be used anymore. One can use the
  colpathnames attribute for that purpose.

  zoomCell.py and buffer.py modules refactored.

**Mar 22, 2007**
  zoomCell.py and buffer.py modules refactored.

  The methods for painting cells in a table widget have been updated and
  optimised.

  Debugged management of VLArrays with vlstring and object atoms.

**Mar 21, 2007**
  The properties dialog of leaves has been updated. Several issues concerning
  with PyTables 2.0 have been fixed.

  Management of PyTables scalar arrays improved in the buffer.py module.

**Mar 20, 2207**
  Fixed several minor issues in some help texts. 

  ViTables dependencies on numarray package are being removed. The numarray
  functionality is now provided by numpy. As a consequence numarray will not be
  included anymore in the ViTables installer for Windows. Instead numpy will
  be included so the numarray license has been substituted by the numpy one in
  the 3rd_party_licenses directory.

  The examples directory has been updated. Most of the .h5 files are now
  PyTables 2.0 files.

**Mar 19, 2007**
  ViTables dependencies on numarray package are being removed.

  Management of PyTables user and system attributes has been updated. At the
  moment only PyTables.2.0 attributes are supported.
  The names of the supported data types are still outdated.

**Mar 17, 2006**
  Ensure that both PyTables format version 1.x and 2.x are supported in the
  case of VLArrays.

  zoomCell.py module has been heavily refactored and debugged.

**Mar 16, 2007**
  Starts the adaptation to PyTables 2.0.

  buffer.py module refactored.

**June 01, 2006**
  Solved a couple of bugs that were apparent only on Mac OS X.

  Several usability enhancements added: warning messages are highlighted in
  orange color, files with read-only access permissions are automatically
opened
  in read-only mode, improved bookmarks management in the documentation
  browser...

**May 23, 2006**
  New splash screen behavior. Now it provides the users with feedback that the
  application is loading.

**May 19, 2006**
  Application geometry is now kept between sessions. It includes the position
  and size of the application window and the sizes of the components of the
  viewing area, i.e. the tree viewer, the workspace and the logger.

**May 18, 2006**
  A new indicator has been added to the status bar. The indicator permanently
  shows the path of the item currently selected (if any) in the tree viewer.

**May 16, 2006**
  A view for the selected leaf (if any) of the tree viewer can be opened/closed
  by pressing the plus/minus keys, in the very same way that group nodes can be
  expanded/collapsed.

**May 15, 2006**
  Keyboard focus indicators have been added to the tree viewer and the logger
  in order to improve the application usablility, specially if you are moving
  around using the keyboard instead of the mouse.

**April 28, 2006**
  Added in-place node renaming capabilities. Now a selected node of a given
  object tree can be renamed in-place as well as via Rename dialog.

**April 27, 2006**
  Several contextual menus enhanced and debugged.

**April 26, 2006**
  Added support for the cut node operation.

**April 19, 2006**
  A PDF version of the User's Guide has been added.

**April 07, 2006**
  Files opening has been made easier. Now, a file can be opened by dragging it
  into the tree viewer.

**March 14, 2006**
  The query dialog has been improved. Now it remembers the last entered query
  and uses it to set the initial values of the query if it applies.

**March 10, 2006**
  Added support for any file extension to the File Browser.

  When a table is queried, if the result table is empty, a suitable message is
  logged.

**March 08, 2006**
  Implemented a mechanism to ensure that, if an error occurs when a dataset is
  being accessed, the application cursor will not remain frozen in its clock
  shape.

  The tables query dialog has been debugged. Empty strings are not valid names
  for the column of indices.

**March 01, 2006**
  Node renaming has been debugged.

  User's Guide has been updated.
