koajs/route — pull request #8 by soygul (2014-03-04 14:22:25+00:00)
Title: always psuh 'next' to the route handler fn args

This will make it possible to yield downwards even inside a handled route, like:

```js
app.use(route.get('/test/:param', function *(param, next) {
// ...
yield next;
}));
```