Version changes since version 0.05
----------------------------------

CountDn
---------    
0.05 - first release of desktop version
0.06 - help messages improved
0.07 - menus more conformant to Style guide
0.08 - iconbar icon now appears on right
0.09 (25-Oct-2012) - help messages improved
0.10 - speeded up by using ARM code
0.11 - calculation time shown
0.12 (11-Oct-2014) - remove dependency on MakeDraw
0.13 (13-Oct-2014) - replace 'CountDown' by 'CountDn'
0.14 (13-Oct-2014) - make save perform correctly
0.16 (20-Oct-2014) - improve 'save' window
                   - remove unreadable text
                   - allow target to be changed
0.20 (23-Oct-2014) - allow different solutions to be 
                     shown
0.21 (19-Aug-2016) - truncate +0, -0, x1, 1 operations
0.22 (20-Dec=2016) - fixes a bug where saving aborts
                   - solid drags now used when saving
                     and bounds allow mouse to edge
0.24 (-1-Jan-2020) - adds difficulty spectrum.
                           
C. K. Hall  1st January 2020.

