A channel for adding new content to a layout.
Prior to uPortal 2.5, this channel lived in the org.jasig.portal.layout.channels
package. Since it is part of Aggregated Layouts, it was moved to its present
package for uPortal 2.5.
author: Michael Ivanov, mvi@immagic.com version: $Revision: 36803 $ since: uPortal 2.5