Update Ember (again)

[Turbo87]

This PR updates the Ember app to the most recent v1.13 version and fixes the remaining bug mentioned in #208

[alexcrichton]

Thanks!

I'll deploy this to staging now and then hopefully get around to prod tomorrow

[alexcrichton]

Hm it seems like there's a bit of a more deep-seated issue here that may warrant some more investigation, for example if you go to the all crates index page and click on cargo you'll get the same "Version null does not exist" error again

[Turbo87]

That's what I feared... I guess this is related to #208 (comment). In this case the crates index page returns the crates with versions: null which unfortunately gets converted to versions: [] and appears as if it was sideloaded.

I suspected this to be a bug in Ember Data, but this seems to be expected behavior. What we need to do is implement an adapter/serializer which filters out versions: null and replaces it with undefined.