Added Signin controllers and routes / view tests.
Added dropdown on header for logged in users.
Added form to Sign In.
Added logic for "create" in sessions controller.
Added routes and tests for sessions.
Fixed issue with flash, error not appearing on invalid signin.
began writing code for remember_tokens and sessions helper.
Commented out Backbone header.
Moved header into a partial layout in Rails.
defined destroy request in sessions_controller.
Sign in users after user.save (after signup)
Wrote sessions helpers including definitions for signed in?, current user? and sign out.
added header to layout.
Wrote test to check that user that has clicked "sign out" is signed out.
wrote test to check that a new user is signed in.