Create /api/parse-packet endpoint

[geoffrey-wu]

This would run the packet-parser.py file from the qbreader/packet-parser repository (which could be included as a submodule or something).

Alternatively, I might want to extend the qbreader/packet-parser repository to be its own website that runs on its own Heroku dyno (since we are running python code on arbitrary input, there shouldn't be any vulnerabilities but there is potential to overwhelm the server, so better to be safe).