changelog
    
    
    - Wed, 22 Sep 2021 12:55:44 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Wed, 22 Sep 2021 12:55:44 +0300] rev 137
 
    - Add documentation to model.cpp
 
    - Wed, 22 Sep 2021 12:30:48 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Wed, 22 Sep 2021 12:30:48 +0300] rev 136
 
    - Work on edit history
 
    - Wed, 22 Sep 2021 00:25:31 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Wed, 22 Sep 2021 00:25:31 +0300] rev 135
 
    - Merge commit
 
    - Wed, 22 Sep 2021 00:25:13 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Wed, 22 Sep 2021 00:25:13 +0300] rev 134
 
    - Add remaining serialize methods
 
    - Tue, 21 Sep 2021 19:58:06 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Tue, 21 Sep 2021 19:58:06 +0300] rev 133
 
    - Begin work on edit history
 
    - Tue, 21 Sep 2021 16:00:15 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Tue, 21 Sep 2021 16:00:15 +0300] rev 132
 
    - Begin work with serialization
 
    - Fri, 17 Sep 2021 22:43:22 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 17 Sep 2021 22:43:22 +0300] rev 131
 
    - add missing change to document.cpp