Renaming the Xhtml interface to Html interface
Adding a HttpModel interface to help with page titles
Adding an abstract getCurrentModuleMap() method

 for dispatchers - to show in IDE type hinting autocompletion
Session related fixes
Throwing exceptions when a template is faulty - it's easier to debug
Different default for showing the exception back traces based on development environment
Avoiding a infinite loop of include's
Forgot to update the EmptyModel to implement the HttpModel interface