Added gitanalytics.
updating config.rb to take advantage of ENV VARS
updating usage info to recommend ENV vars
Simplifying usage info in README
setting a default response value for when our key is not set
Adding additional usage notes to the README file
Adding additional usage notes to the README file
updating in-app usage advice for half-configured applications
Merge pull request #2 from ryanj/master

Recommending the use of environment variables for application keys, secrets, and other config details