add a very basic route from yaml creator, spit out routes (and soon docs...) on /routes

This adds the option to provide an parsed yaml file which will then map methods, routes and pass params to the command specified in the yaml file.  e.g. routes.yml

```yml
get:
  route: "/hello/:world_id"
  command: world_hellos
```
It also adds a mapping to sinatra at '/routes' to show prettified yaml as html.