Updating test and install requirements to fit what's actually required.
Updating test and install requirements to fit what's actually required.

Hopefully we can remove the need for SQLAlchemy, and tgext.authorization as hard requirements for the project before beta 2.

--HG--
extra : convert_revision : svn%3A77541ad4-5f01-0410-9ede-a1b63cd9a898/trunk%405635

lucius-feng/tg2,lucius-feng/tg2