ANNOUNCE: Cheese 3.5.3 released

Initial rough port to GMenu for application-wide menu support. Also lots 
of fixes, big and small, thanks to Hans de Goede.

what is it?
===========
Take photos and videos with your webcam, with fun graphical effects

what's changed in 3.5.3?
========================
   - Add border to capture page of preferences dialog
   - Add accelerators to menu items
   - Make the preferences dialog work again
     Move the Cheese.Camera to Cheese.Main and use the same camera in
     Cheese.MainWindow and Cheese.PreferencesDialog. Setup the Camera in
     Cheese.Main.
   - Enable handling of the shoot action
   - Enable effects state change action
   - Enable handling of the fullscreen action
   - Set photo button text based on mode state
   - Make preferences and mode actions application-wide
     Move PreferencesDialog from MainWindow to Main. Handle app.mode action
     changes and update the state accordingly.
   - Add David King to authors in about dialog
   - Start porting to application-wide GMenu
     Add a menu to the application, and enable application-wide actions for
     showing the help, showing the about dialog and quitting the application.
     Move the GtkBuilder definition of the about dialog into Cheese.Main.
   - Update TODO
     Remove some completed TODO items.
   - Use a realtime preset for video encoder element