Swarm plugged

Basically changes in the model and collection. Method sync changed
locally for each instance. How it works see:
- https://github.com/gritzko/swarm/blob/master/lib/BackboneCollectionMixin.js
- https://github.com/gritzko/swarm/blob/master/lib/BackboneModelMixin.js
Demo video: http://www.youtube.com/watch?v=ZIwqWo349Uc