generate deck model
added database validations: no nilvalues for any fields in time_periods or hero_cards
add db validations to deck migration
make/fix up migrations for deck and make join table deck_cards
started basic dealing/card js code. Starting to test js/server communications.
added tests for deck and deck card relationships, and changed deck_card to deck_card_relationships everywhere
reset the javascript to a blank slate
Merge pull request #7 from raccoons-2014/player_decks

Merging in Deck table, model, and relationships.