Added FactoryGirl and Faker gems for testing.
Added configuration for FactoryGirl.
Added controller testing for subject.
Created factories for testing.
Added SimpleCov gem.
Added cards table.
Created tests for cards table.
Created models for cards table.
Renamed flashcards table to decks table. This was due to confusion between the cards and flashcards tables.
Changed Flashcard to Deck due to renaming the table.
Merge pull request #3 from nicolejpaz/feature/individual_cards

Feature/individual cards