Adjust query params param order

[alexspeller]

This is what was discussed with @wycats on twitter and IRC. The summary is:

If your route has query params specified:

App.IndexRoute = Ember.Route.extend({
    beforeModel:      function( queryParams, transition ) {},
    model:            function( params, queryParams, transition ) {},
    afterModel:       function( resolvedModel, queryParams, transition ) {}
});

If your route does not have query params specified:

App.IndexRoute = Ember.Route.extend({
    beforeModel:      function( transition ) {},
    model:            function( params, transition ) {},
    afterModel:       function( resolvedModel, transition ) {}
});

This is backwards compatible, a better long term api, and needs no flag setting.

This PR really just updates the tests. The meat of this is in tildeio/router.js#50 (the updated router.js is included here).

[wagenet]

@alexspeller We didn't do this for your first commit, but can you prefix your commit with [FEATURE query-params]? Thanks!

[alexspeller]

@wagenet done