added python code to nodeprep stuff using pythons xmpp. added a test that does exactly that (but it creates valid utf8 strings in a very expensive way - i dont have internet on this flight, so half my brain is offline - i will leave it like this for now).
no longer producing an extra newline at the end
no longer trimming the output, since we no longer have an extra newline at the end of the python output. this leads to empty strings in round two working properly. shorter test strings means we can have more of them. yeey!
less debug output
Merge pull request #1 from zond/master

Added some random string tests.