SecurityService fixes and cleanup.  AuthenticationService formatting cleaned up.

* Removed promise handler in login function which fixes #10 and fixed formatting in the login and logout functions.
* Fixed SecurityService.spec returning false positives.  In an effort to fail a test if a success/fail callback was called and maintain a readable test, the expression expect('some method').not.toBe('called') was used, but it should have read expect('some method not').toBe('called').  The original expectation would always be true and therefore not perform its function, whereas the second reads appropriately and will always be false.
* Cleaned up formatting and promises in AuthenticationService