Multiple whitespace-separated callbacks in delegateEvents for the View

Hi all,

Sometimes you have a number of elements on a page which should react on events by mixing already defined callbacks. In order not to create redundant aggregative methods I suggest to use following approach: 

```coffeescript
class ContentView extends Backbone.View
  
  events:
    'click .decorate' : 'decorate'
    'click .reorder'  : 'reorder'
    'click .mix-it'   : 'decorate reorder'

  decorate: (e) ->
  # ...

  reorder: (e) ->
  #  ...
```

Hope someone will find it useful.