changelog
    
    
    - Sat, 15 Sep 2018 15:57:56 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 15 Sep 2018 15:57:56 +0300] rev 1430
 
    - refactor
 
    - Tue, 07 Aug 2018 20:34:32 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Tue, 07 Aug 2018 20:34:32 +0300] rev 1429
 
    - added constexprs
 
    - Sat, 04 Aug 2018 21:46:58 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 04 Aug 2018 21:46:58 +0300] rev 1428
 
    - fixed a crash when trying to open a document for the 3rd time after closing it 2 times
 
    - Fri, 13 Jul 2018 20:48:55 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 13 Jul 2018 20:48:55 +0300] rev 1427
 
    - add const