CLN: removed un-needed julia files
PY-CLN: pep-8 stuff and moved TODO section

The TODO stuff is now in the main todo.TODO file, not
in the smolyak_opt docstring
TODO: added some todo notes
PY-CLN: pep-8 stuff and moved TODO section

    The TODO stuff is now in the main todo.TODO file, not
    in the smolyak_opt docstring