Tag and release metrics-db version 0.0.1
We should start tagging metrics-db versions and write a ChangeLog.
In theory, there won't be many metrics-db instances, because we already provide all the metrics data that researchers and interested users need. But who knows. We shouldn't have to worry about breaking people's stuff when changing metrics-db, so let's give them stable versions.
Before we can tag we should clean up the documentation a bit. Probably.