Updated package.json to work with modern npm.

The npm that ships with v0.10.15 didn't like "Slick Bonobo" as the name
and I hadn't defined any deps.
Abstract out response logic.

So now SlickBonobo just does the setup with SlickBonobo.ProxyResponse
doing the logical response.
Implement basic userscript functionality.

Such that userscripts can be created, picked up by config and run in in
the context of a window object. It's still very simplistic but
demonstrates the desired functionality.