Better defaults for route files.

* HTTP methods are colored like scala keywords (dark red, bold)
* controller methods are italic
* controller classes are blue

Also made the editor react to changes in the HTTP method coloring.

Fixed #78.

Also added a cute icon for URL completions.
![screen shot 2013-05-02 at 1 52 02 pm](https://f.cloud.github.com/assets/133742/453606/bf54da1a-b31e-11e2-85f4-c37bb6058a10.png)