- Fixed request not properly drained in case of error ([138](https://github.com/pyrates/roll/pull/138))
- Moved `app.url_for` helper to a dedicated extension: `named_url` ([143](https://github.com/pyrates/roll/pull/143))
- Added `request.referrer` and `request.origin` shortcuts ([147](https://github.com/pyrates/roll/pull/147))