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
* @generated
	 */
	EAttribute getGradient_Direction( );
	/**
	 * Returns the meta object for the attribute '{@link org.eclipse.birt.chart.model.attribute.Gradient#isCyclic <em>Cyclic</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the attribute '<em>Cyclic</em>'.
	 * @see org.eclipse.birt.chart.model.attribute.Gradient#isCyclic()
	 * @see #getGradient()
	 * @generated
	 */
	EAttribute getGradient_Cyclic( );
	/**
	 * Returns the meta object for the attribute '{@link org.eclipse.birt.chart.model.attribute.Gradient#getTransparency <em>Transparency</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the attribute '<em>Transparency</em>'.
	 * @see org.eclipse.birt.chart.model.attribute.Gradient#getTransparency()
	 * @see #getGradient()
	 * @generated
	 */
	EAttribute getGradient_Transparency( );
	/**
	 * Returns the meta object for class '{@link org.eclipse.birt.chart.model.attribute.Image <em>Image</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for class '<em>Image</em>'.
	 * @see org.eclipse.birt.chart.model.attribute.Image
	 * @generated
	 */
	EClass getImage( );
	/**