updated the alembic version in requirements.txt
upper bound on the alembic version under 0.5.0
reverted the word type to type_ in sqlachemy versions for the compatibility of older alembic version
reverting back to Eric's requirments file
Added Email Notification to Ceilometer Alarm services
Merge branch 'most_updated_eric_branch' into devel
Merge branch 'devel' of https://github.com/jyericlin/ceilometer into devel