fixed bug where pages would not transition

When you change the router parameters like [this](https://github.com/Wikia/mercury/commit/a03661f4a17679bed552f01c9ebe0d19362c0203#diff-19ee40e3bcfd31a4e779f03e649232af), you also have to change the `route#model` method parameters. Otherwise clicking links to other pages doesn't work.

@hakubo @kenkouot @aquilax