marketstore integration

[goodboy]

It works, that marketstore, and I gotta say it's not too bad.

I've got tick data from real-time feeds finally going and it seems pretty aight for latency even with the numpy.array() write inline with trio/tractor streaming code.

Need to work on the schema a bit and figure out if using variable length column series is indeed a better fit.
Misunderstood what isvariablelength meant, see alpacahq/marketstore#325.

Here's the outstanding todos:

• use trio-websocket to stream from the streaming trigger system
• automate the official docker image spinup using either docker-py or aiodocker
• capture and process the structured logging from the server which is using zap using a monitoring actor I guess?