cleaned up routes, clarified routes in forms
Implemented user registration and login with Bcrypt passwords
Can create users in database
Updated views to display login information and errors on wrong login
enforce login on create_survey view
use sessions to keep track of user across routes
Renamed signup.erb to register.erb
created logout route
Merge pull request #5 from gopher-snakes-2013/create-register-users

User registration and login, Bcrypt, more descriptive routes, improved HTML in views