Reduce dependencies

Allow us to be a little more standalone so that we can run this as a CI task.
I'd prefer the standard use case to check the place where it should exist in a standard Rails project. If this is not acceptable then it should be user defined. That way we're covering all use cases and being less magic. Happy to help out if necessary :smile: 


![](https://www.nerdist.com/wp-content/uploads/2014/05/shia-labeouf-magic-gif.gif)