Revert to the FUTURE_PYTHON_API, this means:

- switching the define on in buildsystems (NaN, auto and msvc are done)
- again import _Blender, which is the C module, from the Python modules

intern/python/modules/Blender/Scene.py

@@ -14,7 +14,7 @@
     newscene.link(cam)
     newscene.makeCurrent()               # make current Scene
 """  
-#import _Blender.Scene as _Scene
+import _Blender.Scene as _Scene
 
 from Object import Object
 import shadow