[Bf-python] Python bug with user counts

[Ken Hughes]

Willian Padovani Germano wrote:

> Again, making bpy a "user" of Blender data may be more troublesome than 
> it's worth, since the original system wasn't done with that possibility 
> in mind. Maybe we should add a new toggle or counter specific to BPy 
> data, like id.py_us or something, that would always be zeroed when 
> exiting from Blender or restarting Python. Anyway, something to be 
> investigated / discussed properly.

So should we remove the current "Python is a user" code until we come up 
with something safer?

Ken