fixed more examples
makefile target for happy -g Parser.y -iinfo
changed while to 'repeat' <sts> 'end' 'while' <cond> 'do' <sts> 'end', the 'repeat' is optional or the 'while' is optional too, at least one must be in. Changed StWhile to StLoop, adding a (Seq (Lexeme Statement)), for the 'repeat' part