 Changes between te-3.2 and tree-3.3
-------------------------------------

- changed name from te-3.2 to tree-3.3 and left out everything not
  directly related to the tree widget

- fixed bug that occurred when tree node name contained blanks

- changed tree widget code that caused core dump on some archs
  (config values are now in a separate structure and not members of the class)

- added tcl utility routines for dealing wth trees: tree.tcl
  (I had done this using [incr tcl], but that wasn't available in time
   for Tk-3.3)

- simplified the demos
  (Dirtree is now just a simple demo, and not a full application. This
   should make it easier to understand)

- added a new tree subcommand: tree ancestors
   which returns a list of a tree nodes ancestors.

- various internal code changes, such as the use of C++ streams
  for executing tcl code (see TkTreeNode.cc. If someone knows a 
  better way to do this, I would be glad to hear about it).
