add opencell logging

Logging at a lower level is kind of broken, since python http.client uses print statements instead of python's builtin logging facilities 😱 (https://stackoverflow.com/questions/16337511/log-all-requests-from-the-python-requests-module/16337639#16337639)

So for our purposes it's better to just monkey patch python opencell client.

I'm loggging json objects to ease processing later