Upgrade to Rails 4
Change environment configs to remove deprecation warnings from Rails 4
Change syntax of confirm() to accomodate the deprecation warnings of Rails 4
Remove hash rockets in favor of new hash syntax to accomodate upcoming deprecation
Remove auto_explain_threshold_in_seconds from config to accomodate deprecation warnings in Rails 4
Add bin directory for Rails 4
Add rails_12factor gem for Heroku
Merge branch 'feature/upgrade_to_rails_4' into develop

* feature/upgrade_to_rails_4:
  Add rails_12factor gem for Heroku
  Add bin directory for Rails 4
  Remove auto_explain_threshold_in_seconds from config to accomodate deprecation warnings in Rails 4
  Remove hash rockets in favor of new hash syntax to accomodate upcoming deprecation
  Change syntax of confirm() to accomodate the deprecation warnings of Rails 4
  Change environment configs to remove deprecation warnings from Rails 4
  Upgrade to Rails 4