Bug 104986 Backgound image uses an absolute path
Currently Chart uses an absolute path to indicate a backgournd image, that may cause the design unusable on other environments. Expected the background image can be definded in multiple ways like in report designer. e.g. URI(absolute path), File(relative path), Embedded Image(Encoded Image Data).
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/AxesRenderer.java
* @throws RenderingException
	 */
	private final void renderMarkerRanges( OneAxis[] oaxa,
			Bounds boPlotClientArea ) throws ChartException
	{
		Axis ax;
		EList el;
		int iRangeCount, iAxisCount = oaxa.length;
		MarkerRange mr;
		RectangleRenderEvent rre;
		DataElement deStart, deEnd;
		AutoScale asc;
		double dMin = 0, dMax = 0;
		int iOrientation, iCompare = IConstants.EQUAL;
		final Bounds bo = BoundsImpl.create( 0, 0, 0, 0 );
		final IDeviceRenderer idr = getDevice( );
		final ScriptHandler sh = getRunTimeContext( ).getScriptHandler( );
		final boolean bTransposed = ( (ChartWithAxes) getModel( ) ).isTransposed( );
		final PlotWithAxes pwa = (PlotWithAxes) getComputations( );
		final StringBuffer sb = new StringBuffer( );
		Bounds boText = BoundsImpl.create( 0, 0, 0, 0 );
		Anchor anc = null;
		Label la = null;
		TextRenderEvent tre;
		Orientation or;
		double dOriginalAngle = 0;
		for ( int i = 0; i < iAxisCount; i++ )
		{
			ax = oaxa[i].getModelAxis( );
			iOrientation = ax.getOrientation( ).getValue( );