changelog
    
    
    - Mon, 19 Mar 2018 10:57:13 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Mon, 19 Mar 2018 10:57:13 +0200] rev 1301
 
    - moved inverting code into a new file
 
    - Sun, 18 Mar 2018 23:31:15 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 18 Mar 2018 23:31:15 +0200] rev 1300
 
    - added comment editing
 
    - Sun, 18 Mar 2018 12:37:40 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 18 Mar 2018 12:37:40 +0200] rev 1299
 
    - fixed color handling