PaulUithol/Backbone-relational — pull request #173 by driehle (2012-07-17 13:19:25+00:00)
Title: Fixed unregistering of models in Backbone-relational's store

Hey there,

currently, when a model object is unregistered from the store of Backbone-relational, it looses the reference to its collection - that is `model.colletion` becomes an undefined value.

In my application that causes some trouble, because my model is stored in an undo-stack after it is destroyed an will be restored, if the user hits the "Undo"-Button. However, for the undo-process there needs to be a reference the the collection the model was originally in.

Feel free to merge this change if you like.

Regards.