[WIP] json audit script

I wanted to know what flags and materials were being used in the JSON files, and then I got curious about other stuff. Run from the commandline with:

    python json_audit.py

and get text output. Should work with vanilla Python version 2.7 (and probably 2.6).

Useful for me, but is this useful to anyone else? If so, what sort of stats would others want to see?

I'll clean it up a little more, document it, and add some options (file restrictions, summary function restrictions, etc.) If not, no harm, I got what I needed from it and will keep it around just in case I want it again.