print out error if login fails
fab9: make firebase url a constant
fab9: remove FIREBASE_URL constant, it breaks app
fab9: setup firebase and angularfire

index.html: link to firebase and angularfire scripts
index.js: register firebase as a module in our app
fab9: wrap app in a namespace
fab9: add routes
fab9: create files for all controllers
fab9: link to all controllers from index.html
fab9: it's working so far
fab9: create view dashboard.html
fab9: add views for history and new-workout
fab9: views and nav links work
fab9: ability to retrieve user's auth state
fab9: merge lots of misc stuff