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
change expiration date on cache to 20 minutes
add tests for GameEngine::Deck class
modify GameEngine::Deck class to take an ActiveRecord model instead of an array of cards to pass tests
factor out doubled logic inside GameEngine::Game into a Player class
update GameEngine methods to work correctly with new Player class
fix specs to correctly test with the new Player class