Blender Git Loki

Cleanup BKE_id_free_ex().

Add 'missing' bpy code from BKE_libblock_free_ex(), now both functions
do exactly the same thing, only the later is less flexible (fewer
'exotic' behaviors supported, like handling IDs outside of bmain etc.).

Next step: nuke usages of BKE_libblock_free functions, makes no sense to
have twice the same code around!