changelog
    
    
    - Thu, 09 Feb 2017 19:57:43 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 09 Feb 2017 19:57:43 +0200] rev 1110
 
    - Moved more business logic out of GLRenderer into Canvas. GLRenderer::pick(const QRange&) now returns a set of LDObjects without modifying them. Replaced the GLRenderer::pick(int, int) overload with GLRenderer::pickOneObject.
 
    - Thu, 09 Feb 2017 19:32:41 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 09 Feb 2017 19:32:41 +0200] rev 1109
 
    - Made GLRenderer's Model pointer const
 
    - Thu, 09 Feb 2017 13:26:44 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 09 Feb 2017 13:26:44 +0200] rev 1108
 
    - Moved more editing-related methods to Canvas.