emberjs/ember.js — pull request #4007 by machty (2013-12-29 07:50:00+00:00)
Title: [FEATURE query-params-new] Query params rewrite

See here for some examples: https://gist.github.com/machty/8167051

Depends on Handlebars subexpressions:
https://github.com/wycats/handlebars.js/pull/690