extended Collection.prototype.fetch, added before:add:all and add:all event before and after 'add' events

gistfile1.coffee

orgFetch = Backbone.Collection::fetch
Backbone.Collection::fetch = (options={}) ->

  success = options.success
  options.success = (collection, resp, options) ->
    collection.trigger 'before:add:all', collection, resp, options
    collection.each (model) ->
      model.trigger('add', model, collection, options)
    collection.trigger 'add:all', collection, resp, options
    success(collection, resp, options) if success

  options.silent = true

  orgFetch.call(this, options)