Tests readme whitespace fix

In an effort to give browserify some performance speedup, I am trying to convince people to use mine in place of detective there. This patch contains

* I updated mine.js to the latest version in js-linker
* Added tests adapted from [detective](https://github.com/substack/node-detective)
* Added a README file.

If this is accepted, the plan is to update [module-deps](https://github.com/substack/module-deps) to depend on mine instead of detective.