Fixes README examples

If you're gonna try to register something with a name that has two
colons in it, Ember.js resolver will stop working properly.

[Current implementation](https://github.com/stefanpenner/ember-jj-abrams-resolver/blob/618dca2affd21e980f7efee83e3f5c7a170887bb/dist/ember-resolver.prod.js#L231) of resolver will ignore everything after second
colon.