Working authorization_spec tests in konacha.
Allow & deny access with both prototypes and instances of Score objects.
Required creation of authorization & score ember models, and modification of ember-data store declaration.
Also refactored hardcoded api urls into ApiUrl js object which gets values from server-side code
Updated ember & ember-data, which required:
* remove 'id' from all models
* new router
* remove app.initialize()

Also added users & scores, and tried to add authorization via ember.js "can" nelper, but failed.

This commit is not clean.