added actions to create a new user
added pending specs for user model
added user authentication, tested for invalid credentials
added pending specs for user notification email
user receives confirmation email
a registered user receives an invite to a chat room
added mailer specs
users can log in from controller
added user login
added feature specs to test user login
all user login working
deleted unused spec
changed invitation submission process
changed invitation to save, includes user id, new user email, and chat id
user authentication working, as well as invitations
pulled in master
fixed merge conflict in the show page