Ember.Router loses context for dynamic segments on page reload
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I've been trying to debug this for a while now, and I may have figured out what the problem is, let me explain what is happening by use of a [fiddle](http://jsfiddle.net/ivanvanderbyl/mfqEB//)

Navigate to http://fiddle.jshell.net/ivanvanderbyl/mfqEB/show/#/projects/1, you'll notice the dynamic segment in the url is replaced with `null` — it should stay as `1`

From what I can gather, after routing once, Ember Router then makes a call to update the URL, replacing the dynamic segments with the values it gets from the respective instantiated objects, in this case App.Project.

The problem is that `App.Project` is not loaded at this point so `id` is `null`

Now whether this is a bug or an implementation failure on my part, has anyone else seen this?