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/composites/MarkerIconDialog.java
*            the string to trim
	 * @return the trimmed string, or null if the string is empty
	 */
	private static String trimString( String value )
	{
		if ( value == null )
			return null;
		value = value.trim( );
		if ( value.length( ) == 0 )
			return null;
		return value;
	}
	/**
	 * 
	 * @return If the user clicks "OK", returns true. Otherwise, returns false.
	 */
	public boolean applyMarkerIcon( )
	{
		return applyMarkerIcon;
	}
	/**
	 * 
	 * @return Returns an icon palette to Line series.
	 */
	public Palette getIconPalette( )
	{
		return iconPalette;
	}
}