ITPRootElement and ITPPage

ITPRootElement represents the root of the object tree. It offers a method to register an info structure during construction of the HTML page and implements initialization such that:

• it constructs an object for each registered info structure
• it constructs the node tree by applying parent-child relations
• it makes sure that each object initializes itself
• it makes sure that all objects synchronize (by sending messages)

ITPPage derives from ITPRootElement, adding one simple function isContentWizard, which indicates whether or not the page shows a Content Wizard.