* gtk/Widget.custom: expose some easy bool properties for checking
certain WidgetFlags. Make Allocation a settable property.
* gtk/glue/widget.c: bit of glue to make Allocation settable.
* gdk/Window.custom: expose UserData as a usable IntPtr property.
* gdk/Gdk.metadata: hide old GetUserData/SetUserData methods.
* doc/*: ran the updater.
svn path=/trunk/gtk-sharp/; revision=28974