(index) Include Firebase and FirebaseAuthClient library scripts
(profile) Integrate Firebase authentication into app

This code authenticates users via Firebase's Simple Login API. Upon
authorization, the API returns a user object that contains the UserID.
That UserID is then used to grab profile data for that user, and store
it in our Profile service (which can be injected into any controller).

I'll probably combine the FirebaseAuth and Profile services into one
single "User" service in the future. And I'll probably rename the Firebase
service to something generic like "Data".
(profile) Redirect to main page after login
(index) Fix top bar drop down when logged in
(profile) Move Firebase service to app.js
(app) Rename Firebase service to 'Database'
(app) Isolate Firebase service into a separate file & module
(firebase) Rename Firebase service from 'Database' to 'FirebaseIO'
(user) Rename 'profile.js' file to 'user.js'
(app) Refactor 'myhonorsProfile' module to 'myhonorsUser'
(app) Remove myhonors variable and use daisy chaining for declaring everything