Google payed account

I know this is a rather big PR with lots of changes. It not only adds the google payed account, but also

* Removes the monkey patching of Hash because it let to lots of problems in our app
* Added a gemspec and used that instead of echoe
* Changed @@ variables to be constants
* Added minitest

If you only want a few of those things, just mention what you don't like and I will create a new PR with just the things you like :wink: