Updated Google/FB login buttons

There is code in _ExternalLoginsListPartial for both Google and
Facebook's login buttons. However, the code is commented out
unless/until we figure out how to hook it into the existing MVC external
authorization process. MVC CSS buttons work as intended, they simply
don't use FB/Google's "official" designs.
Merge branch 'master' of https://github.com/manzar79/FinalPro