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
* 
	 */
	abstract public void importCssStyles( CssStyleSheetHandle stylesheet,
			List selectedStyles );
	/**
	 * Sets the theme to a report.
	 * 
	 * @param themeName
	 *            the name of the theme
	 * @throws SemanticException
	 */
	public void setThemeName( String themeName ) throws SemanticException
	{
		ThemeCommand command = new ThemeCommand( (Module) getElement( ) );
		command.setTheme( themeName );
	}
	/**
	 * Returns the refresh rate when viewing the report.
	 * 
	 * @return the refresh rate
	 */
	public ThemeHandle getTheme( )
	{
		Theme theme = getModule( ).getTheme( module );
		if ( theme == null )
			return null;
		return (ThemeHandle) theme.getHandle( theme.getRoot( ) );
	}
	/**
	 * Sets the theme to a report.