Bug 117149 Add additional datapoint markers
I would like to propose adding additional datapoint markers. Attached is a set of markers I would like supported.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/util/LiteralHelper.java
* @return
	 */
	private static NameSet getDirectionSet( )
	{
		String prefix = "Direction."; 
		String suffix = ".displayName"; 
		return new NameSet( prefix,
				suffix,
				toStringNameArray( Direction.VALUES ) );
	}
	/**
	 * @return
	 */
	private static NameSet getLegendItemTypeSet( )
	{
		String prefix = "LegendItemType."; 
		String suffix = ".displayName"; 
		return new NameSet( prefix,
				suffix,
				toStringNameArray( LegendItemType.VALUES ) );
	}
	/**
	 * @return
	 */
	private static NameSet getVerticalTickStyleSet( )
	{
		String prefix = "TickStyle."; 
		String suffix = ".displayName"; 
		return new NameSet( prefix, suffix, new String[]{
				TickStyle.ACROSS_LITERAL.getName( ),