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.ui.extension/src/org/eclipse/birt/chart/ui/swt/type/AreaChart.java
private transient Image imgStacked = null;
	private transient Image imgStackedWithDepth = null;
	private transient Image imgPercentStacked = null;
	private transient Image imgSideBySide = null;
	private transient Image imgSideBySide3D = null;
	private static final String[] saDimensions = new String[]{
			TWO_DIMENSION_TYPE,
			TWO_DIMENSION_WITH_DEPTH_TYPE,
			THREE_DIMENSION_TYPE
	};
	public AreaChart( )
	{
		imgIcon = UIHelper.getImage( "icons/obj16/areacharticon.gif" ); 
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.ui.swt.IChartType#getName()
	 */
	public String getName( )
	{
		return TYPE_LITERAL;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.ui.swt.IChartType#getImage()
	 */
	public Image getImage( )
	{