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/Image.py

@@ -8,7 +8,7 @@
     im = Image.Load('dead-parrot.jpg')
 """
 
-#import _Blender.Image as _Image
+import _Blender.Image as _Image
 import shadow
 
 class Image(shadow.shadow):