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.
Most of the code comes from bpython/intern/opy_window.c, but two
new functions were added, to access the file and image selector
windows in Blender.
* Added submodules Draw (gui) and BGL (OpenGL wrapper):
The code comes from bpython/intern/opy_draw.c, with minor changes
to integrate it in the new implementation.
* Made changes to Camera, Lamp and Image submodules:
The implementation was improved. These files should be good
starting points for interested new coders to look at, now.
* Renamed interface.[ch] to EXPP_interface.[ch] to avoid conflict:
There is another interface.h file in source/blender/include.
