This is version 1.9.0 of the BLT library.  It is an extension to 
Tk toolkit (it requires no patching of the Tcl or Tk libraries).  

This library works with the following releases of Tcl/Tk ONLY.  I, Jeffrey
Hobbs jhobbs@cs.uoregon.edu, have patched BLT to reach this state with the
help of others input, notably Richard Ball, Sven Delmas, and George Howlett.
If you have any problems, please email me at jhobbs@cs.uoregon.edu (may be
invalid after summer 1996).  Home sites (for newest versions, contact info):

	http://www.cs.uoregon.edu/~jhobbs/work/
	ftp://ftp.cs.uoregon.edu/pub/jhobbs/

This version of BLT works with the following tcl/tk versions ONLY:

	tcl 7.4 / tk 4.0 (any patchlevel)
	tcl 7.5a2 / tk4.1a2

Make sure to that after running 'configure', it finds the right combination
of libraries and include files (in other words, don't use 4.0 includes with
4.1 libraries).  'make sharedlib' makes a shared library on systems that it
understands.

The BLT toolkit contains the following widgets/commands:

1) Drag-n-drop command: blt_drag&drop
	Updated version of Michael McLennan's drag and drop command
	(it's still maintained by Michael). 

2) Hypertext widget: blt_htext
	Allows text and Tk widgets to combined in a single scroll-able 
	window.

3) Busy window: blt_busy
	For handling user-interaction when the application is "busy".
	Manages an invisible "busy" window which prevents further 
	user device (keyboard, mouse, button, etc.) interactions.
	Also provides a different cursor which supersedes application
	cursors.

4) Bitmap command: blt_bitmap
	Lets you read and write bitmaps from Tcl. Can define X bitmaps  
	and create bitmaps from text strings.  Other options query any 
        loaded X bitmap.

5) Background "exec" command: blt_bgexec
	Like "exec ... &", but collects the output of the detached 
	UNIX subprocesses and sets a Tcl variable upon their completion.
	Can be used with "tkwait variable" to handle application's 
	expose events, etc. while waiting for subprocesses to finish.  

6) Table geometry manager: blt_table
	Specify window placements as table row,column positions. Also
	has many options for placing constraints on window resizes.

7) Barchart widget: blt_barchart
	
8) XY graph widget: blt_graph

9) Window option command: blt_win
	Lets you raise, lower, map, or, unmap any window.  

10) Watch commands: blt_watch
	Lets you specify Tcl procedures to be run before and/or
	after every Tcl command.  May be used for logging,
	tracing, profiling, or debugging or Tcl code.

11) Simple command trace: blt_debug
	Simply prints out each Tcl command before it's executed.  

12) Cutbuffer and bell commands: blt_cutbuffer, blt_bell
	The commands are derived from the "bellcut" extensions and are 
	provided as a convenience.  Credit should go to the author(s) 
	(I can't remember who they are. Sorry) for this work.

See ChangeLog for further changes updates.