Add build_doc.sh to the release files whitelist
Revert "Use find_packages from setuptools"

This reverts commit e0139df7f9ee6ce52299d9384189ac3f942169f5.

find_packages adds a bunch of cruft to the tarball. The release fabfile
already verifies that no files are missing, so there is no need to worry
about that.

Conflicts:
	setup.py