code: function(el, value, options)
  	{
  		var view = options.view;
  		var states = value.split(' ');
  		
  		var stateChangeHandler = (function()
  		{
  			this.cbInclude(el, states.indexOf(view.currentState) != -1);
  		}).bind(this);
  		
  		view.addEventListener('change:currentState', stateChangeHandler, this);
  		stateChangeHandler.call(this);
  	}
docs: Only includes the specified element in the layout when the View's `currentState`
  matches one of the states listed in the attribute's value; multiple states should
  be separated by spaces
  
  @param 		{HTMLElement}	el - DOM element to which the attribute applies
  @param 		{*} 			value - The value referenced by the attribute
  @param 		{Object} 		options - Options relating to this binding
  @returns		{void}
  
  @example
  <div cb-include-in="happy sad elated"></div>