Log Message:
Changes 2.10.10:
* RadioAction: Correct a reference-counting error in the "changed" signal.
* RecentManager: Allow Gtk::RecentManager::Data to be instantiated, for use with
  the full version of add_item().
* Menu: Fix memory problems during destruction by handling attached widgets as
  we already handle child widgets.
* Correctly ifdef-out initialization of deprecated classes.
* Build: Cope with newer m4 versions.
* Documentation:
  FAQ: Emphasize that libglademm is preferred to glademm.