code: function(el, value, options, className)
  	{
  		className || (className = options.propertyName);
  		
  		!conbo.isEmpty(value)
  			? __ep(el).addClass(className)
  			: __ep(el).removeClass(className)
  			;
  	}
docs: Applies or removes a CSS class on an element based on the value
  of the bound property, where cb-class="myProperty:class-name" will apply
  the class "class-name" when "myProperty" is a truthy value, or
  cb-class="myProperty" will apply the class "myProperty" when "myProperty"
  is a truthy value
  
  @param 		{HTMLElement}	el - DOM element to which the attribute applies
  @param 		{*} 			value - The value referenced by the attribute
  @returns		{void}
  
  @example
  <div cb-class="propertyName"></div>
  <div cb-class="propertyName:my-class-name"></div>