Added a link to create an account from the login page
Changed Gemfile to use PostgreSQL for Heroku
Added rails_12factor to Gemfile (needed by Heroku apparently)
Added sessions controller spec
Merge branch 'hannah' into connor
Added links to the header
sessions_controller tests working. added some seed data to seeds.rb
Merge branch 'hannah' of https://github.com/connorboyd/Fakeblock into connor