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
/**
	 * Sets the value of the '{@link org.eclipse.birt.chart.model.type.LineSeries#getShadowColor <em>Shadow Color</em>}' containment reference.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @param value the new value of the '<em>Shadow Color</em>' containment reference.
	 * @see #getShadowColor()
	 * @generated
	 */
	void setShadowColor( ColorDefinition value );
	/**
	 * Returns the value of the '<em><b>Connect Missing Value</b></em>' attribute.
	 * The default value is <code>"true"</code>.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * Specifies if connect the missing values in the line or just skip drawing.
	 * <!-- end-model-doc -->
	 * @return the value of the '<em>Connect Missing Value</em>' attribute.
	 * @see #isSetConnectMissingValue()
	 * @see #unsetConnectMissingValue()
	 * @see #setConnectMissingValue(boolean)
	 * @see org.eclipse.birt.chart.model.type.TypePackage#getLineSeries_ConnectMissingValue()
	 * @model default="true" unique="false" unsettable="true" dataType="org.eclipse.emf.ecore.xml.type.Boolean"
	 *        extendedMetaData="kind='element' name='ConnectMissingValue'"
	 * @generated
	 */
	boolean isConnectMissingValue( );
	/**
	 * Sets the value of the '{@link org.eclipse.birt.chart.model.type.LineSeries#isConnectMissingValue <em>Connect Missing Value</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->