changelog
    
    
    - Sun, 12 Feb 2017 16:02:02 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 12 Feb 2017 16:02:02 +0200] rev 1123
 
    - Reworked iterable enums: they all are enum classes now and the end value is marked with "_End"
 
    - Fri, 10 Feb 2017 23:06:24 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 10 Feb 2017 23:06:24 +0200] rev 1122
 
    - Added the RingAdapter class and interfacing ring() function and simplified some math in GLCompiler with it
 
    - Thu, 09 Feb 2017 23:51:42 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 09 Feb 2017 23:51:42 +0200] rev 1121
 
    - Replaced uses of currentDocument() in GLRenderer with m_model