Many long standing memory leaks fixed in the BPY api.

Data from Armature.c and logic.c still leaks.

Mostly todo with PyList_Append adding a refcount and the bpython api not decrefing.

Also added some features needed to fix a bug in mesh_clean.py (ob.pinShape and ob.activeShape)

source/blender/python/BPY_interface.c

@@ -877,6 +877,7 @@ int BPY_menu_do_python( short menutype, int event )
 
 	if( !setup_armature_weakrefs()){
 		printf("Oops - weakref dict\n");
+		MEM_freeN( buffer );
 		return 0;
 	}