Update puma to version 2.8.2
Update arel to version 5.0.1.20140414130214
Update minitest to version 5.3.3
Update rake to version 10.3.0
Update jquery-ui-rails to version 4.2.1
Update parser to version 2.1.8
Update rake to version 10.3.1
Update Google Analytics code and use env vars

The GA ID and domain name were hardcoded before. I moved them to environment variables and wrapped the script inside a conditional so that it only gets displayed in production if the env var has been set.

I also updated the README with instructions for setting the env vars on Heroku.
Merge pull request #32 from monfresh/google-analytics

Update Google Analytics code and use env vars
Update parser to version 2.1.9
Update ast to version 2.0.0
Update safe_yaml to version 1.0.3
Update rubocop to version 0.21.0
Update font-aswesome-rails to version 4.0.3.2
Update multi_json to version 1.9.3
Update multi_json to version 1.10.0
Update rails to version 4.1.1
Update Ruby version to 2.1.2
Update ruby-progressbar to version 1.5.0
Update tins to version 1.2.0