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/TypePackage.java
* The meta object literal for the '{@link org.eclipse.birt.chart.model.type.impl.PieSeriesImpl <em>Pie Series</em>}' class.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @see org.eclipse.birt.chart.model.type.impl.PieSeriesImpl
		 * @see org.eclipse.birt.chart.model.type.impl.TypePackageImpl#getPieSeries()
		 * @generated
		 */
		EClass PIE_SERIES = eINSTANCE.getPieSeries( );
		/**
		 * The meta object literal for the '<em><b>Explosion</b></em>' attribute feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EAttribute PIE_SERIES__EXPLOSION = eINSTANCE.getPieSeries_Explosion( );
		/**
		 * The meta object literal for the '<em><b>Explosion Expression</b></em>' attribute feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EAttribute PIE_SERIES__EXPLOSION_EXPRESSION = eINSTANCE.getPieSeries_ExplosionExpression( );
		/**
		 * The meta object literal for the '<em><b>Title</b></em>' containment reference feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EReference PIE_SERIES__TITLE = eINSTANCE.getPieSeries_Title( );
		/**