code: function registerCollection(identifier, collection, model) {
  	this.registeredModelsAndCollections[identifier] = {
  		collectionClass: collection
  		, modelClass: model
  	};
  }
docs: Function: registerCollection
  Registers a specific <Barefoot.Collection> and the <Barefoot.Model>s which
  are contained in it with the given identifier. This information is needed
  when serializing the DataStore for transferring data to the client.
  
  You will not be able to serialize a store containing collections which were
  not registered before!
  
  Important:
  Do not register "instances" of a collection. Instead, register its "class".
  
  Parameters:
  (String) identifier - A unique identifier for this collection type
  (Barefoot.Collection) collection - Collection type
  (Barefoot.Model) model - Model type contained in the collection