*****Release of TH 1.0*****

Changed the buttons to menus. Now Help and Quit are under the Misc. menu. The
Teach button has been replaced by a menu, and various types of Teaching are
listed under the menu (they vary for different hypertools). The Source menu now
lives with the other menus, and they all live in a menubar on top of the window.
The output text now lives below the menubar, and the hypertool-specific other
stuff live below the output text.

*****Release of TH 1.1*****

Things are converted to Tk4.0. Changes: too numerous to list them all. Here are
the user-visible changes not implicit in Tk4.0:

- Widget and Source menus (which were formerly filled with radiobuttons) are now
option menus.

-* Added busyth, a hypertool that sends tools into busy mode whenever you press
a button or key inside them.

-* Finally broke down and gave the output text a scrollbar.
- Actually, the text now has a vertical and horizontal scrollbar, and no
character-wrapping.

- Packeth has been reincarnated as displayth, which handles widgets managed by
texts and canvases as well as the packer and placer. It also handles menu
entries, and lets you duplicate widgets and menuentries.

- Added poputh, which teaches a remote widget to use a remote menu as popup
when some button is pressed. In the help window, pressing button-3 over the
help text brings up a menu of headers, you can go to any header by selecting it.

- The Teacher Hypertools now take advantage of the Elsbeth bindings, if they're
available. The only user-visible change is that the 'Index' menu is no longer
available off the Help window...to bring up the Index menu, you need the
Elsbeth bindings loaded. (run th to see how to do this), and press Button 3
over the Help window.

*****Release of TH 2.0 Beta 1*****

- Updated lib/dialog.tcl to add Tk updates to dialog routine (to reflect a few
Tk bugfixes).

- Fixed displayth; it no longer assumes widgets are always managed by their
parents.

- Changed configureth so it closes application-defaults file after writing a
set of defaults.

*****Release of TH 2.0 Beta 2*****
