Call setupUnicode, but don't make it available yet

Not sure if it's better or not to have the "unicode"
name accessible, given that we don't support much
of its functionality at all.

For instance, sre_compile detects if "unicode" is available,
and if so, calls `type(unicode(""))` which will fail for us.
Last few things to get go.py working

With a quick modification to get around the "import os.path" issue,
we are able to run go.py!