Rewrote process_document.py because (for whatever reason) the first time it just pushed a blank file and all is lost.
Rewrote process_document.py because (for whatever reason) the first
time it just pushed a blank file and all is lost.

Hopefully it's as good as it was before. (The output of the
transformed traning data is diff'ed to be identical, so there's that.)

streamcorpus/streamcorpus-zoner,streamcorpus/streamcorpus-zoner