- croak if "return/wantarray" is called inside try/catch/finally block
    -> similar for next,last,redo
    -> later: implement return from subrutine inside try/catch/finally blocks

 - update stacktrace / caller ? 

 - test usage in different module that it is used

 - implement keyword "rethrow" or simple use die?
 - rewrite documentation to English ;)
 - check TODOs in source-code