env 'subprogram' key gets '_function' or '_subroutine' values
update TODO
many rules from <T> -> <NT>
add 'help' option to pppts
<T> -> <NT> work
<T> -> <NT> work
<T> -> <NT> work
<T> -> <NT> work (last of it, maybe...)
update TODO
update TODO
tweak output text from translator