* api/gtk-api.xml: changed DisplayOptions by SetDisplayOptions.
* sources/Gtk.metadata: added rename hint for DisplayOptions. Moved
GtkHTMLStream hints to 'misc' area (they were in 'rename' area).
* gtk/Calendar.custom: added a .net style GetDate override.
* sample/CalendarApp.cs: updated to new methods in the Calendar API.
svn path=/trunk/gtk-sharp/; revision=12799