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
* Comment for <code>orientationSet</code>
	 */
	public static final NameSet orientationSet = getOrientationSet( );
	/**
	 * Comment for <code>riserTypeSet</code>
	 */
	public static final NameSet riserTypeSet = getRiserTypeSet( );
	/**
	 * Comment for <code>scaleUnitTypeSet</code>
	 */
	public static final NameSet scaleUnitTypeSet = getScaleUnitTypeSet( );
	/**
	 * Comment for <code>sortOptionSet</code>
	 */
	public static final NameSet sortOptionSet = getSortOptionSet( );
	/**
	 * Comment for <code>stretchSet</code>
	 */
	public static final NameSet stretchSet = getStretchSet( );
	/**
	 * Comment for <code>triggerConditionSet</code>
	 */
	public static final NameSet triggerConditionSet = getTriggerConditionSet( );
	/**
	 * Comment for <code>unitsOfMeasurementSet</code>
	 */
	public static final NameSet unitsOfMeasurementSet = getUnitsOfMeasurementSet( );
	/**
	 * Comment for <code>leaderLineStyleSet</code>
	 */