Adds Gemfile.lock to .gitignore
Updates Faraday version and call to #register_middleware
No need to use rash anymore since hashie now has its own Rash class
Need to call register_middleware on Response rather than Request
Remove reference to an ActiveSupport method
Use new syntax for registering middleware
Merge pull request #2 from kellym/chore/update_faraday

Chore/update faraday