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/impl/LineSeriesImpl.java
boolean oldConnectMissingValue = connectMissingValue;
		boolean oldConnectMissingValueESet = connectMissingValueESet;
		connectMissingValue = CONNECT_MISSING_VALUE_EDEFAULT;
		connectMissingValueESet = false;
		if ( eNotificationRequired( ) )
			eNotify( new ENotificationImpl( this,
					Notification.UNSET,
					TypePackage.LINE_SERIES__CONNECT_MISSING_VALUE,
					oldConnectMissingValue,
					CONNECT_MISSING_VALUE_EDEFAULT,
					oldConnectMissingValueESet ) );
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean isSetConnectMissingValue( )
	{
		return connectMissingValueESet;
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain eInverseRemove( InternalEObject otherEnd,
			int featureID, NotificationChain msgs )
	{
		switch ( featureID )