fixing #29

git-svn-id: http://py-leveldb.googlecode.com/svn/trunk@68 72a8a67b-58ad-ce6a-cf8f-6a8106eb947b
Include current versions of leveldb/snappy, update setup.py to be
compatible with pypi.
Add support for MacOS builds.
Python reports 'Darwin' for MacOS.
Add local include path for pickier (aka correct) compilers.
Add header files to manifest.
Enable snappy.
Fix includes.
Add fast compile option; integrate bug fix from Arni.
Merge branch 'master' of github.com:rjpower/py-leveldb

Conflicts:
	setup.py