Merge pull request #15 from mlafeldt/foodcritic

Add Foodcritic lint checks
Add test-kitchen to gems
Add test-kitchen config
Add test-kitchen Rake tasks
Add integration test for deploy user
Add integration test for Ruby
Add integration test for God
Add integration test for MailCatcher
Add integration test for Unicorn
Add integration test for Nginx
Add integration test for PostgreSQL
Add integration test for Rails app