Added Scene.set_frame RNA function to get immediate scene update.

Changing Scene.current_frame doesn't work in this case because it adds 
a notifier.

Also added RNA_property_update call in pyrna_struct_setattro so that 
notifiers are added when a property changes.

source/blender/makesrna/intern/rna_pose_api.c

@@ -1,6 +1,4 @@
 /**
- * 
- *
  * ***** BEGIN GPL LICENSE BLOCK *****
  *
  * This program is free software; you can redistribute it and/or