Version 2.11.91

Changes since 2.11.90

* Remove icons or parts of icons as appropriate to remove trademarks
  (Rodney Dawes)
* Remove KDE app info icons as the mime type is no longer used
  (Rodney Dawes)
* Remove seagulls from OpenDocument mime type icons
  -- bug #303599 (Jakub Steiner, Rodney Dawes)
* Add a DnD directory accept icon for 16px size
  -- bug #306188 (Jakub Steiner)
* Remove 192px sized cdrom icon
  -- bug #312099 (Jakub Steiner)
* Remove Firefox logo icon at 24px size
  -- bug #312839 (Jakub Steiner)
* Updated translations [sr, sr@Latn, zh_TW]