Remove distribute dependency.

Distribute has been merged with upstream setuptools. The two are
incompatible now, so MySQL-python is uninstallable on systems
with setuptools >= 0.7 installed.
Replace raise Error with distutils exception.

Distutils has an exceptions heirarchy. Use it.
Remove distribute_setup.py reference in MANIFEST

We're not using it anymore, remove the setuptools warning about it not
existing.
Merge https://github.com/farcepest/MySQLdb1 into merge-upstream
Merge pull request #44 from emonty/master

Stop using distribute