Bug 136279 Structure and table datatypes should be hidden.
Description: Structure and table datatype should be hidden. Steps to reproduce: In table data binding, I saw structure and table two datatypes. They are not supported now, so they should be removed.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* Returns the iterator over all embedded images of this module instance.
	 * Each one is the instance of <code>EmbeddedImageHandle</code>
	 * 
	 * @return the iterator over all embedded images.
	 * 
	 * @see EmbeddedImageHandle
	 */
	public Iterator imagesIterator( )
	{
		return getPropertyHandle( IMAGES_PROP ).iterator( );
	}
	/**
	 * Returns the list of embedded images, including the one from libraries.
	 * Each one is the instance of <code>EmbeddedImageHandle</code>
	 * 
	 * @return the list of embedded images.
	 * 
	 * @see EmbeddedImageHandle
	 */
	public List getAllImages( )
	{
		return getStructureList( IMAGES_PROP );
	}
	/**
	 * Determines if the design has changed since it was last read from, or
	 * written to, the file. The dirty state reflects the action of the command
	 * stack. If the user saves the design and then changes it, the design is
	 * dirty. If the user then undoes the change, the design is no longer dirty.
	 * 
	 * @return <code>true</code> if the design has changed since the last load