Update Ruby to 2.1.1

Previously, the application was running on Ruby 2.1.0, which was also
causing the Travis build to break and was also opening the application
up to some potential security vulnerabilities. The application has been
updated to run on the latest version of Ruby (2.1.1).

https://trello.com/c/jYMG9vYd
Update sample environment variables

Previously, some sensitive data was being stored in the application's
sample environment variables, which was presenting a security issue. The
variables have been updated to use dummy values.

https://trello.com/c/ss5habYR