3.23.0 - 2017/02/26

New Features:
  * New optional dependency: UnitTest++ (required only for running gnote tests)
  * Removed dependency: boost (all of it)
  * Gnote now internally uses Unicode strings for all data

Fixes:
  * Fix indentation sometimes getting is lost after restart (#773630)
  * Use %1 style placeholders instead of %1% in translatable strings (#774262)
  * Make app menu item ordering consistent with GNOME (#772009)
  * Use open-menu-symbolic icon for menu (#775320)

Translations:
  * Updated translations:
    - Brazilian Portuguese (pt_BR)
    - Czech (cs)
    - Danish (da)