added production group under gemfile
updated gemfile
updated controller and views to allow for login with either email or username and signup with email additionally.
Merge pull request #36 from raccoons-2014/herokutest

All good, merged.
added login with email test
Merge pull request #37 from raccoons-2014/login-email-un

All good. Merged.
add Dalli gem
remove commented-out Byebug gem from Gemfile
run bundle and install Dalli and dependencies
add caching and Dalli settings to all environments: test, production, and deploy
update Deck factory to include both users and cards
remove p statement from card_factory
add test to ensure that the Deck model has a valid factory
add specs for testing GameEngine module and some associated classes
update GameEngine::Game class to pass tests
move code to create new game objects into the GameEngine::Game describe block
write specs for GameEngine::Cache module
create GameEngine::Cache module
modify GameEngine::Game to save ids (need them to create unique names for cached objects)
write tests for GameEngine::Cache saving and fetching functions