It's inspired from this jQuery widget.
http://www.erichynds.com/jquery/a-jquery-ui-growl-ubuntu-notification-widget/


Simply have a component that could show some notification 
and show/detach with fade effect.

Simple Demo
http://www.youtube.com/watch?v=5Wy4cERMOe0

Test Zul:

<zk>
	<notification title="test title" message="test" />

	<notification message="test" />

	<notification width="200px" height="200px" message="test" />

	<notification width="200px" height="200px" title="test title"
		message="test" />

	<notification
		style="background:none repeat scroll 0 0 rgba(59, 219, 107, 0.8)"
		width="200px" height="200px" message="test" />

	<notification message="test component.detach" onClick="self.detach();" />

	<notification message="will close after 5 seconds"
		onCreate="self.detachAfter(5);" />

</zk>