Backbone.js 0.9.9 Released
This is an "almost-1.0" preview release -- so if you've got a Backbone app, I'd appreciate it if you'd take the time to upgrade, and report issues and concerns.Some of the more significant updates are:    * `listenTo` and `stopListening` for easier event unbinding.

    * HTTP PATCH support, for partial updates.

    * collection.update(models) for "smart" add/remove/merge in one method.

    * Events.once, a-la jQuery. Also jQuery-style event map syntax.

    * Lots of performance tuning for triggering millions of events per second
      (should you find the need) in modern browsers. 
      http://jsperf.com/events-vs-events2/3