change "let's us" to "lets us"
Merge pull request #59 from lemonkoala/master

Grammar
updated for rails 4 and ruby 2
Merge branch 'rails4'
Merge pull request #63 from paterson/master

Updated for Ruby 2 and Rails 4
Add rails_12factor gem, to support heroku deploys
Merge pull request #76 from justinsb/heroku

Add rails_12factor gem, to support heroku deploys
Update README.md
Merge pull request #1 from lockitron/master

Master