[pypy-dev] ndarray-subtype branch looking for review

[Matti Picus]

The ndarray-branch passes tests both translated and untranslated. I ran 
it through the numpy test suite as well, specifically the matrix class 
tests, and it seems to pass them.
Would anyone like to review, or should I just go ahead and merge?
Specifically, I may have missed some w_ prefixes on app-level instances, 
or may not have tested all the code paths, and I had to hack the 
FakeSpace in compile.py to allow subclassing.
Matti