[introspection] Add missing annotations to GDataCalendarCalendar
[introspection] Add missing annotations to GDataCalendarCalendar

Pecisk/libgdata,pwithnall/libgdata,GNOME/libgdata,Distrotech/libgdata,Pecisk/libgdata-gtasks,Pecisk/libgdata,Distrotech/libgdata,Pecisk/libgdata-gtasks,pwithnall/libgdata,Distrotech/libgdata,Pecisk/libgdata-gtasks,Pecisk/libgdata