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/Marker.java
/**
	 * Sets the value of the '{@link org.eclipse.birt.chart.model.attribute.Marker#getType <em>Type</em>}' attribute.
	 * <!-- begin-user-doc --> Sets the type of marker. <!-- end-user-doc -->
	 * @param value the new value of the '<em>Type</em>' attribute.
	 * @see org.eclipse.birt.chart.model.attribute.MarkerType
	 * @see #isSetType()
	 * @see #unsetType()
	 * @see #getType()
	 * @generated
	 */
	void setType( MarkerType value );
	/**
	 * Unsets the value of the '{@link org.eclipse.birt.chart.model.attribute.Marker#getType <em>Type</em>}' attribute.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @see #isSetType()
	 * @see #getType()
	 * @see #setType(MarkerType)
	 * @generated
	 */
	void unsetType( );
	/**
	 * Returns whether the value of the '{@link org.eclipse.birt.chart.model.attribute.Marker#getType <em>Type</em>}' attribute is set.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return whether the value of the '<em>Type</em>' attribute is set.
	 * @see #unsetType()
	 * @see #getType()
	 * @see #setType(MarkerType)
	 * @generated
	 */
	boolean isSetType( );