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
if ( h instanceof ParameterGroupHandle )
			{
				addParameters( list, (ParameterGroupHandle) h );
			}
		}
		DesignElementHandle.doSort( list );
		return list;
	}
	/**
	 * Returns an external file that provides help information for the report.
	 * 
	 * @return the name of an external file
	 */
	public String getHelpGuide( )
	{
		return getStringProperty( HELP_GUIDE_PROP );
	}
	/**
	 * Returns the script called when the report starts executing.
	 * 
	 * @return the script called when the report starts executing
	 */
	public String getInitialize( )
	{
		return getStringProperty( INITIALIZE_METHOD );
	}
	/**
	 * Returns a slot handle to work with the master pages within the report.
	 * Note that the order of the master pages within the slot is unimportant.
	 *