Tests

Here are some tests (as per #3), which are failing (taking most of the data from the `README.md` file). Those should be fixed in the source before I can finish the other tests and make a pull request for another function called `defaults` (you can see here, taken from the PHP Kohana framework. http://kohanaframework.org/3.3/guide/kohana/routing ) and the ability to provide your own regex. Initially I was going to make a port from the Kohana to Node, because that's a seriously good router there, and reversable-router is the closest I could find.