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
return (ThemeHandle) theme.getHandle( theme.getRoot( ) );
	}
	/**
	 * Returns the name of the author of the design report.
	 * 
	 * @return the name of the author.
	 */
	public String getAuthor( )
	{
		return getStringProperty( AUTHOR_PROP );
	}
	/**
	 * Returns the command stack that manages undo/redo operations for the
	 * design.
	 * 
	 * @return a command stack
	 * 
	 * @see CommandStack
	 */
	public CommandStack getCommandStack( )
	{
		return module.getActivityStack( );
	}
	/**
	 * Returns a slot handle to work with the top-level components within the
	 * report.
	 * 
	 * @return A handle for working with the components.
	 */
	public SlotHandle getComponents( )