changelog
    
    
    - Sun, 29 Aug 2021 22:14:42 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 29 Aug 2021 22:14:42 +0300] rev 127
 
    - added a simple matrix transformation tool
 
    - Sun, 29 Aug 2021 21:28:08 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 29 Aug 2021 21:28:08 +0300] rev 126
 
    - moved ObjectEditor under SelectTool
 
    - Sun, 29 Aug 2021 20:39:55 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 29 Aug 2021 20:39:55 +0300] rev 125
 
    - Move tools under Document instead of MainWindow
 
    - Sun, 29 Aug 2021 20:05:24 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 29 Aug 2021 20:05:24 +0300] rev 124
 
    - esc with draw mode now clears the polygon
 
    - Fri, 27 Aug 2021 14:38:56 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 27 Aug 2021 14:38:56 +0300] rev 123
 
    - refactor
 
    - Fri, 27 Aug 2021 00:55:32 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 27 Aug 2021 00:55:32 +0300] rev 122
 
    - Show concave polygons as red while drawing
 
    - Fri, 30 Jul 2021 01:28:39 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 30 Jul 2021 01:28:39 +0300] rev 121
 
    - added right click support for draw tool