Data schema plan

[staticfloat]

We need to come up with a data schema for passes to dump into a database.

Right now, I'm thinking each data analysis gets its own database, with its own schema. Each analysis pass will be responsible for outputting a CSV-like output, (e.g. "downloads per day, per UUID, per julia version") and a database engine (such as MySQL) will serve queries upon those databases to the world. We'll run the analysis once per day on the last month of data, and as we add new analyses/fix bugs, we'll update that entire time window with the better results, while historical results will just be frozen in time.