include SimpleCov for test coverage reporting
typo and gitignore
ignore swap files and stuff
MOAR GEMS
Setup testing stuff.
RSpec, Capybara, FactoryGirl, Guard & friends.
Use puma by default (like a boss).
Please see related blog post:
 http://sudo-science.com/starting-a-new-rails-4-2-project-with-postgresql-and-rspec