updated gemfile with simplecov, installed rspec, edited spec_helper configuration
created submissions model and controller, submissions index shows all submissions
installed devise and devise views
sign in feature successfully passing test
seeded database
added validator for submission title
added validators for link and description for submissions
added user reference to submissions table, association spec passing for users
association spec passing for submissions
user sign in spec passing
incorporated factory girl into spec for signed in user to make a new submission
added comments model and controller, enabled user to post comment
added sign out link to application view
refactored sign in spec using factory
added association specs for user and submission models