Failing specs 

Hello I added some failing spec to the sinatra interface. Btw the problem is not related to the sinatra adapter.

Basically we have two problems:

1) If we have similars routes like: <code>/foo</code> and <code>/foo/bar</code> usher didn't ignore trailing delimiters
2) If we have a route like <code>/foo-:id</code> usher didn't recognize it correctly

Any idea how to fix them?

Thanks!
