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
/**
	 * Returns the value of the '<em><b>Size</b></em>' attribute. <!-- begin-user-doc --> Gets the size of the
	 * marker in the chart (as a percentage). <!-- end-user-doc --> <!-- begin-model-doc -->
	 * 
	 * Specifies the size of the marker in the chart (as a percentage).
	 * 
	 * <!-- end-model-doc -->
	 * 
	 * @return the value of the '<em>Size</em>' attribute.
	 * @see #isSetSize()
	 * @see #unsetSize()
	 * @see #setSize(int)
	 * @see org.eclipse.birt.chart.model.attribute.AttributePackage#getMarker_Size()
	 * @model unique="false" unsettable="true" dataType="org.eclipse.emf.ecore.xml.type.Int" required="true"
	 * @generated
	 */
	int getSize( );
	/**
	 * Sets the value of the '{@link org.eclipse.birt.chart.model.attribute.Marker#getSize <em>Size</em>}' attribute.
	 * <!-- begin-user-doc --> Sets the size of the marker in the chart (as a percentage). <!-- end-user-doc -->
	 * @param value the new value of the '<em>Size</em>' attribute.
	 * @see #isSetSize()
	 * @see #unsetSize()
	 * @see #getSize()
	 * @generated
	 */
	void setSize( int value );
	/**
	 * Unsets the value of the '{@link org.eclipse.birt.chart.model.attribute.Marker#getSize <em>Size</em>}' attribute.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->