I'd like to get a stable beta released on conda and we're nearly there. This addresses #68 by pointing to the approrpriate sources in the DataStore docstrings

still remaining:

• add metadata to existing datasets #68 metadata
• add pooling option to cluster analytics #84 parameterize pooling before scaling
• add missing currency variables to inflation adjustment #59 inflation variables
• release tobler on conda
• migrate data to new quilt bucket, as in issues with core data #166

#59 was started by @JennEYoon who did the hard work of identifying the missing NCDB variables but the refactor means we'll need to restructure her PR. I don't mind reworking for the new changes, but I also want to make sure that @JennEYoon gets the opportunity to send code and become an official contributor, if that's something that's important to you, @JennEYoon?

I'll get the tobler release and pooling options done this week. The only other thing we had on the list for 0.1 release was the time series plotting. That would be nice, but i'm prepared to push it to the next release. I've been experimenting with proplot which is fantastic, but doesnt handle geopandas legends very well at the moment