Changed Hero Cards to Cards in all files, created new factory, deleted old references to Hero_Card objects
All tests for Refactor passed. Final commit
Merge pull request #29 from raccoons-2014/cards_table_refactor

Changed Hero Cards to Cards
update UsersController to re-enable logging in, support email and password params
update Users table to include a password and email field
add has_secure_password validation to User model
delete old two-user form
add migration to update users table with new fields for password and email
run new migrations and update the schema
add form for new users and a temporary form for user profiles
add SessionHelper methods for logging in/out
add form for user login
create SessionsController for managing login and logout
add routes for login, logout
include SessionsHelper in UsersController
fix redirect and add error handling for new user creation
add password_confirmation to the accepted params list
delete the feature tests for creating users from the game page due to registration changes
add validations for User model
add tests for UserControlelr to ensure that new users must be created with a username and password