Refactors our factories into separate files, factories.rb was getting messy.
Merging in FactoryGirl refactor made on develop.
Delete an empty file that was left in the merge.
Adds Devise test helpers for controller specs.
Implements a few basic factories for Generic File objects
Renamed the sign_in method provided in spec/support/utilities.rb to features_sign_in to differentiate it from the helper provided by Devise.
Beginnings of a generic_files_controller spec.  This is a good thing to have, given the number of custom actions defined on the controller.  Note that this also demonstrates how to access a route defined in a provided Engine.