2.7.4:

Gtk:
* Generated properties accessors.
  (Murray Cumming)
* Settings::get_default(): Do not generate 
  a second wrapper. (Regis Duchesne)
* TreeView: Added unset_model().
* SUN Forte and Tru64 build fixes.
  (The Written Word.)
* Documentation fixes. (Jonathon Jongsma)