[vala] (10 commits) Created branch staging

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'staging' was created.

Summary of new commits:

  fe03f33... gtk+-2.0, gtk+-3.0: port lots of annotations from the GIR v
  3c7a3de... gtk+-3.0: Add type_ids and abstract annotations for classes
  adec305... gtk+-3.0: port "struct" annotations from the GIR version
  8ac9fd8... gtk+-2.0, gtk+-3.0: Hide non-public symbols
  a9da8ee... gtk+-2.0: port "struct" annotations from the GIR version
  f78c22a... gtk+-2.0, gtk+-3.0: port more annotations from the GIR vers
  06ea099... gtk+-2.0, gtk+-3.0: more various fixes
  7ce88fd... gtk+-2.0, gtk+-3.0: Make Widget.get/set_parent compatible w
  cb2e3d1... gtk+-2.0, gtk+-3.0: Radio/ActionCallback are only vala-help
  d443e74... gtk+-2.0, gtk+-3.0: Gtk.get_default_language is unowned