Adds unit testing over the mods_setter_helpers module.
Adds a getter for the mods collection field and a simple boolean helper that returns true if the given mods record has been flagged as a collection.  Might see some use someday.
Objects returned from Fedora were inserting newline characters and a fair amount of whitespace into corporate creator records.  This adds code to the mods helper module that eliminates both of these things when we fetch an object's corporate creators.
Adds a factory for spinning up a Root Collection.  Required to test collection creation.
Adds prerequisite gems and spec_helper configuration for feature spec tests.
Two quick patches.  The first involves adding an extra @collection.save! to the nu_controller action so that the updated mods identifier field will actually be persisted.  The second is a one character typo fix in a view.
Adds a working, quick test of basic collection creation and a single utility method for facilitating signin.