.parseCollection() accidentally updates "self only" stored collections.

[gxxcastillo]

Say we have a "self only" collection in the store. If .parseCollection() gets called with a "current" collection, the "self only" collection will be updated with the links and actions of the current collection.

This is a bug. I'm thinking that the only that should be updated on the "self" collection when parsing a "current" collection are the models.