Code Generator for Eclipse Code

Improved the progress monitoring somewhat

Fixed NullPointerException when accessing uninitialized parser

Fixed the inconsistancy with jet generation and referencimplementation

Implemented a more flexible use of the extensions so that they don't exclude each other (only the first one is evaluated) but the best one.

Predecessor may be of type Content instead of Element

Added todo with an idea for more generalisation and more flexibility

Added method to collect all radio button fields of a group
some small corrections toward correct parsing of a one column layout

Test class set up

Test class set up

Added infrastructure for one column layout test