Populate the records associations after create (in create blueprint)
added an `Ember` service to collect useful functions that can help transforming Sails models into Ember Data compatible JSON

`linkAssociations`: a function that will create the „links“ object used to define relationships in the REST API, a link looks like `posts: "/api-prefix/user/1/posts"`
New populate blueprint to enable DS.RESTAdapter to fetch `links` from record relations.
Updated README
Merge branch 'master' of github.com:mphasize/sails-ember-blueprints