0. Empty application

• an application classFolder, here 'emptyapp' (in the classes folder, it is empty),
• an application folder, here 'emptyapp', holding the following:
  • a file 'skinIndex.php' with the content for the MainPart of the IndexPage 
  • a file 'skinSubmenu.php' to hold the application menu items (empty)
  • an index.php script that instantiates site with the name of the application folder as its argument:

    include ("../classes/classSite.php");
    $site = new Site('emptyapp');
    $site->handleRequest();

• an item in the file 'skinMenuPart.php' in the 'includes' folder that consist of:
  • a hyperlink to the application folder, naming the application in its content
  • a call to $this->printSubmenu with the name of the application folder as its argument