Add documentation/introspection annotation for gtkosx_application_get()
Add documentation/introspection annotation for gtkosx_application_get()

jralls/gtk-mac-integration,jralls/gtk-mac-integration,GNOME/gtk-mac-integration,jralls/gtk-mac-integration,sharoonthomas/gtk-mac-integration,sharoonthomas/gtk-mac-integration,sharoonthomas/gtk-mac-integration,sharoonthomas/gtk-mac-integration,GNOME/gtk-mac-integration,GNOME/gtk-mac-integration,sharoonthomas/gtk-mac-integration