Bug 152828 Add the projectFolder property on module
When user doesn't set the resource folder path in designer, there should be a default working path for Birt to manage the report design and find the related resources. A new property should be added on Module: name: projectFolder type:URL This property only can be given from the open design method from session but should not be set after the module initialized. Concern about the backward compatiblity issue, a new method will be added. Open design with a config argument.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
*            the image to add
	 * @throws SemanticException
	 *             if the name is empty, type is invalid, or the same name
	 *             exists.
	 */
	public void addImage( EmbeddedImage image ) throws SemanticException
	{
		PropertyCommand cmd = new PropertyCommand( module, getElement( ) );
		ElementPropertyDefn propDefn = module.getPropertyDefn( IMAGES_PROP );
		cmd.addItem( new CachedMemberRef( propDefn ), image );
	}
	/**
	 * Checks the name of the embedded image in this report. If duplicate, get a
	 * unique name and rename it.
	 * 
	 * @param image
	 *            the embedded image whose name is need to check
	 */
	public void rename( EmbeddedImage image )
	{
		this.module.rename( image );
	}
	/**
	 * Adds all the parameters under the given parameter group to a list.
	 * 
	 * @param list
	 *            the list to which the parameters are added.
	 * @param handle
	 *            the handle to the parameter group.
	 */