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
*         modules contain.
	 */
	public List getAllStyles( )
	{
		List elementList = module.getModuleNameSpace( Module.STYLE_NAME_SPACE )
				.getElements( IModuleNameScope.ARBITARY_LEVEL );
		return generateHandleList( elementList );
	}
	/**
	 * Returns theme handles according the input level.
	 * 
	 * @param level
	 *            an <code>int</code> value, which should be the one defined
	 *            in <code>IVisibleLevelControl</code>.
	 * 
	 * @return theme handles according the input level
	 */
	public List getVisibleThemes( int level )
	{
		List elementList = module.getModuleNameSpace( Module.THEME_NAME_SPACE )
				.getElements( level );
		return generateHandleList( elementList );
	}
	/**
	 * Returns all data source handles that this modules and the included
	 * modules contain.
	 * 
	 * @return all data source handles that this modules and the included
	 *         modules contain.
	 */