Merge Numba commits#45

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qwergle wants to merge 11 commits intosrossross:mainfrom

Commits on Sep 25, 2012

DOC: Fix Sphinx build directory in the Makefile.
garaud
committed

Commits on Feb 15, 2013

Update for Python 3 compatibility.
Jon Riehl
committed

Commits on Feb 22, 2013

Merge pull request #1 from garaud/develop
Jon Riehl
committed
Merge https://github.com/srossross/Meta into _update
Jon Riehl
committed