Bump and cleanup fn

@yaymukund @tobowers @xcoderzach 

Indirectly added to EndDash's `cleanup` function in `Template.js#cleanup` (traverse EndDash structure and calls `reaction#stopObserving`.

We can optimize and do `model.off('change', null, this)`. Backbone.js iterates through an `_events` hash when you call `off` so its fast

Closing for now (spec writing time / improving)