Copy-paste of the official mapbox example, but with the data copied into the block
Built with blockbuilder.org
forked from enjalot's block: mapbox: omnivore.topojson
https://api.mapbox.com/mapbox.js/v2.3.0/mapbox.js
https://api.mapbox.com/mapbox.js/plugins/leaflet-omnivore/v0.2.0/leaflet-omnivore.min.js