Blender Git Loki

Experimental option to build blender as a python module, rather then blender embedding python.
CMake build option WITH_PYTHON_MODULE, will build ./bin/bpy.so

This allows 'bpy' to be imported from python or other applications/IDE's which embed python, eg:
python -c "import bpy ; bpy.ops.render.render(write_still=True)"

This runs in background mode and has similar restrictions to running a script:
blender --background --python test.py

TODO:
- install to site-packages with blender scripts
- add support for imp.reload()