[setup.py] use sys.exit() instead of exit()
[setup.py] use sys.exit() instead of exit()

exit() or quit() should only be used inside the interactive interpreter,
and not in production code, as they only work if the `site` module is loaded.

`sys.exit()` similarly raises `SystemExit` exception and can be used in
production code as the `sys` module is always guaranteed to be there.

moyogo/booleanoperations,typemytype/booleanOperations,anthrotype/booleanOperations