Added comment.
Added memory fix and test script from Dima Kogan.
Added fix to get rid of argument to derived format() method.
Generalised overload of format() method. Added test script.
Added proper typemaps to use format() calls also in derived classes.
Renamed argument to default_handler.
Added default argument to Fl::run and Fl::wait to support Ctrl-C termination.
Adjusted test file for changed Fl_Vaulator.format signature.