backbone.js:Backbone.sync
> // Make the request, allowing the user to override any Ajax options.
> var xhr = options.xhr = Backbone.ajax(_.extend(params, options));
Backbone allows delegating and undelegating single events on view classes as stated in the [annotated source](http://backbonejs.org/docs/backbone.html#section-163). This pull requests add the two methods to the View class.
The History.started flag is set on the class rather than on the class instance (as it is set once globally). Attempts to read *Backbone.history.started* (via the global history instance) always return undefined. Instead the typing should be static member (*Backbone.History.started* is where the correct value is located). This can be seen at http://backbonejs.org/docs/backbone.html#section-203
Sascha Thiel