Partially implemented. Most of it comes from opy_nmesh.c, plus needed
changes to integrate in into exppython.
* Added helper submodule vector, needed by NMesh.
* Minor changes in other files.
Callbacks registered with Draw.Register in Python are called now.
That should fix submodule Blender.Draw.
* Added a few other missing functions to BPY_interface.c
* Finished implementing Get() function for Camera, Lamp, Image and Text:
Both the .Get(name) and .Get() cases are handled now.
* Added function Blender.ReleaseGlobalDict():
This function should give script writers control over whether the
global Python Interpreter Dict should be cleared after the script is
run (default is to clear). This is a test.
