changelog
    
    
    - Wed, 25 Mar 2020 16:07:20 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Wed, 25 Mar 2020 16:07:20 +0200] rev 87
 
    - added PolygonObject and refactored away a lot of boilerplate
 
    - Thu, 19 Mar 2020 21:06:06 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 19 Mar 2020 21:06:06 +0200] rev 86
 
    - PolygonObjectEditor can now modify the object properly
 
    - Wed, 18 Mar 2020 17:11:23 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Wed, 18 Mar 2020 17:11:23 +0200] rev 85
 
    - added a matrix editing widget
 
    - Wed, 18 Mar 2020 15:54:30 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Wed, 18 Mar 2020 15:54:30 +0200] rev 84
 
    - fix
 
    - Wed, 18 Mar 2020 15:52:16 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Wed, 18 Mar 2020 15:52:16 +0200] rev 83
 
    - refactor, added splitter
 
    - Tue, 17 Mar 2020 23:13:47 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Tue, 17 Mar 2020 23:13:47 +0200] rev 82
 
    - added doublespinbox
 
    - Tue, 17 Mar 2020 23:13:29 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Tue, 17 Mar 2020 23:13:29 +0200] rev 81
 
    - object editor widgets start to form up