Merge pull request #27 from mpath/master

Added the 2GB ram requirement.
tests, they be better
added babel to pip-requirements
set passwd placeholder
Merge pull request #28 from mpath/make_tests_manlier

Added babel to pip-requirements (small bug)
removed l/p from melange models, tweaked installer
Updated readme re: db creds
Merge pull request #29 from mpath/make_tests_manlier

Changed the way the db creds are handled.
added test for models consistency
Everything works, validation tests complete and passing on all databases
Merge pull request #30 from mpath/make_tests_manlier

Green across the board