Data Request: Properati Real Estate Data

[hannahblue]

Properati has real estate listings data for Brazil, Argentina, Mexico (and less for Columbia and Chile) that they make freely available via Google BigQuery. They're eager to have it available through our Data Observatory as well. They put together a list of measures they think would be best for the Data Observatory, and they recommend aggregating it to Neighborhood and City. They can provide us the boundaries if we want them.

The data on GBQ is individual properties listings from which we can derive the measures. Ideally we would reload monthly as new data become available.

cc @juanignaciosl, @antoniocarlon, @michellemho