Update vendor js libraries to latest versions

To celebrate the release of Ember 1.0! :hamster:
Update package.json dependencies to latest versions

Update grunt-ember-handlebars because it needs it.
Update lineman for fun.
Update Ember App to latest conventions

Ember is stable now! :hamster:
Update config/server to respond to all hello ids

Also respond with the an id so the url doesn't end up /#/hello/null.
It looks like createRecord got moved to a "store"
property on the model, but it makes no sense why
I also had to provide the method with the name of
the model as the first argument. SIGH.