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
public static final NameSet axisTypeSet = getAxisTypeSet( );
	/**
	 * Comment for <code>dataPointComponentTypeSet</code>
	 */
	public static final NameSet dataPointComponentTypeSet = getDataPointComponentTypeSet( );
	/**
	 * Comment for <code>dataTypeSet</code>
	 */
	public static final NameSet dataTypeSet = getDataTypeSet( );
	/**
	 * Comment for <code>directionSet</code>
	 */
	public static final NameSet directionSet = getDirectionSet( );
	/**
	 * Comment for <code>groupingUnitTypeSet</code>
	 */
	public static final NameSet groupingUnitTypeSet = getGroupingUnitTypeSet( );
	/**
	 * Comment for <code>intersectionTypeSet</code>
	 */
	public static final NameSet intersectionTypeSet = getIntersectionTypeSet( );
	/**
	 * Comment for <code>legendItemTypeSet</code>
	 */
	public static final NameSet legendItemTypeSet = getLegendItemTypeSet( );
	/**
	 * Comment for <code>markerTypeSet</code>
	 */
	public static final NameSet markerTypeSet = getMarkerTypeSet( );
	/**