Error with designating admin privilege

Testing if a user is an admin by calling current_user.admin?
was working, however I believe it was set up wrong.
I've added a method to the user class but I don't think that
addresses the issue correctly. Any feedback would be helpful.

Here are some additional files that may be helpful: https://gist.github.com/SherrySeibel/52e72d652b8a2f5fab9f

@gabebw