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/model/type/LineSeries.java
* 
 * <!-- begin-model-doc -->
 * 
 * This is a Series type that holds data for Line Charts.
 * 
 * <!-- end-model-doc -->
 * 
 * <p>
 * The following features are supported:
 * <ul>
 * <li>{@link org.eclipse.birt.chart.model.type.LineSeries#getMarker <em>Marker</em>}</li>
 * <li>{@link org.eclipse.birt.chart.model.type.LineSeries#getLineAttributes <em>Line Attributes</em>}</li>
 * <li>{@link org.eclipse.birt.chart.model.type.LineSeries#isCurve <em>Curve</em>}</li>
 * <li>{@link org.eclipse.birt.chart.model.type.LineSeries#getShadowColor <em>Shadow Color</em>}</li>
 * </ul>
 * </p>
 * 
 * @see org.eclipse.birt.chart.model.type.TypePackage#getLineSeries()
 * @model
 * @generated
 */
public interface LineSeries extends Series
{
	/**
	 * Returns the value of the '<em><b>Marker</b></em>' containment reference. <!-- begin-user-doc --> <!--
	 * end-user-doc --> <!-- begin-model-doc -->
	 * 
	 * Specifies the marker to be used for displaying the data point on the line in the chart.
	 * 
	 * <!-- end-model-doc -->