3.1.0
   * Change tweakgroup architecture, tweaks in different files can appear in the same
     categories now; move window border theme to interfaces
   * Tweaks can now override summary/description usually obtained from gconf/gsettings
   * Mark many strings as translatable.
   * Now appears as 'Advanced Settings' in GNOME shell search
   * Add a -v,--verbose option that prints changed settings
   * Add - -d,--debug option
   * Add Unity to OnlyShowIn