Changed database to postres.
Added flashcard routes.
Added flashcards controller.
Added flashcards view.
Added rspec for tdd.
Added shoulda matchers gem.
Wrote tests for Flashcard model.
Created migrations for subjects and flashcards tables.
Added models for flashcard and subject tables.
Added subjects model testing.
Created seeds for flashcards and subjects.
Changed routes to reflect that flashcards belong to a subject.
Created subjects controller and modified flashcards controller to reflect that subjects controller is root.
Created views for subject.
Merge pull request #1 from nicolejpaz/feature/flashcards

Added subjects and flashcards.