Added ability to capture a postgres datbase backup.
Merge pull request #16 from thinkthroughmath/cg/take_a_dump

Added ability to capture a postgres database backup.
Bumped to 0.2.15
must require active_support before core_ext.

solution found here: https://github.com/rails/rails/issues/14664
Merge remote-tracking branch 'origin/master' into adh/update_aliases

* origin/master:
  must require active_support before core_ext.
  Bumped to 0.2.15
  Added ability to capture a postgres datbase backup.
Add / after url. New API configuration requires it
Support - (hyphen) in role names
Update default aliases