Handle Url Encoded Urls

[brycefisher]

@zzmp - currently, urls with url-encoded values cause Iron to silently fail (or trigger the on_error() method). This is true even outside query parameters. Apparently, we need to use rust-encoding to properly handle these values.

[zzmp]

@brycefisher, when you observed this, did you have any middleware linked in? Could you show me a code sample?

[brycefisher]

Oops -- looks like a router specific issue. I think this repo is fine :-)