changelog
    
    
    - Sat, 24 Mar 2018 12:09:26 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 24 Mar 2018 12:09:26 +0200] rev 1322
 
    - renamed sink() to singleton()
 
    - Sat, 24 Mar 2018 12:06:49 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 24 Mar 2018 12:06:49 +0200] rev 1321
 
    - used squared()
 
    - Sat, 24 Mar 2018 12:06:22 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 24 Mar 2018 12:06:22 +0200] rev 1320
 
    - Moved includes, added squared() function
 
    - Sat, 24 Mar 2018 11:57:24 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 24 Mar 2018 11:57:24 +0200] rev 1319
 
    - reorganized headers
 
    - Sat, 24 Mar 2018 11:05:40 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 24 Mar 2018 11:05:40 +0200] rev 1318
 
    - removed unnecessary files and includes
 
    - Sat, 24 Mar 2018 10:51:20 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 24 Mar 2018 10:51:20 +0200] rev 1317
 
    - removed the unused OpenProgressDialog
 
    - Fri, 23 Mar 2018 22:00:34 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 23 Mar 2018 22:00:34 +0200] rev 1316
 
    - reworked includes
 
    - Fri, 23 Mar 2018 21:53:03 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 23 Mar 2018 21:53:03 +0200] rev 1315
 
    - moved Vertex and BoundingBox into new code units