added logic to user controller to only add a user to the db if they haven't been added yet
modified user create action in user controller
added quizlet_modified_time column to decks table
refactored create action for decks controller into helper methods in decks_helper
Change deck table and helper methods to create
deck objects to store an array of json objects
into a cards column in the deck table
able to detect changes from quizlet api and update
users decks
refactored update deck update method by creating
helper methods
merging master into local decks_and_cards
Merge branch 'master' of https://github.com/znagler/flashforward into decks_and_cards
Merge pull request #5 from znagler/decks_and_cards

Decks and cards