Add View.propagateEvent method

If you ever need to listen to an event on one of your child view just to
propagate the event up to your parent here is a method for you.

Example

class App.Views.ParentView extends Agility.View
  initialize: ->
    @childView = this.view('ChildView')
    @childView.on('first:event', handleFirstEvent, this)
    @childView.on('second:event', handleSecondEvent, this)

  handleFirstEvent: (a, b) ->
    this.trigger('first:event', a, b)

  handleSecondEvent: (c, d) ->
    this.trigger('other:name', c, d)

becomes

class App.Views.ParentView extends Agility.View
  initialize: ->
    @childView = this.view('ChildView')
    this.propagateEvent(@childView, 'one:event')
    this.propagateEvent(@childView, 'second:event', as: 'other:name')
Bump to 1.0.9