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/attribute/AttributePackage.java
* <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for data type '<em>Marker Type Object</em>'.
	 * @see org.eclipse.birt.chart.model.attribute.MarkerType
	 * @model instanceClass="org.eclipse.birt.chart.model.attribute.MarkerType"
	 *        extendedMetaData="name='MarkerType:Object' baseType='MarkerType'" 
	 * @generated
	 */
	EDataType getMarkerTypeObject( );
	/**
	 * Returns the meta object for data type '{@link org.eclipse.birt.chart.model.attribute.Orientation <em>Orientation Object</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for data type '<em>Orientation Object</em>'.
	 * @see org.eclipse.birt.chart.model.attribute.Orientation
	 * @model instanceClass="org.eclipse.birt.chart.model.attribute.Orientation"
	 *        extendedMetaData="name='Orientation:Object' baseType='Orientation'" 
	 * @generated
	 */
	EDataType getOrientationObject( );
	/**
	 * Returns the meta object for data type '<em>Percentage</em>'. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @return the meta object for data type '<em>Percentage</em>'.
	 * @model instanceClass="double"
	 * @generated
	 */
	EDataType getPercentage( );
	/**
	 * Returns the meta object for data type '
	 * {@link java.lang.Double <em>Percentage Object</em>}'. <!--