Adding data for Montreal

[jamaps]

including the improve charging stations, DA base choropleth, and pick-up points

Made some minor improvements to the census polygon script

Also refreshed, for other cities, the pick-up and charging data reliant on APIs, just in case they've changed

[jamaps]

oops, just realized that I started this branch from the fetch-osm branch rather than master

[Nate-Wessel]

Montreal has a hell of a lot of charging stations.

[jamaps]

Ya so many!