Add MapBox outdoors as basemap option

[danrademacher]

• [x] create Mapbox account for ECG and provide credentials to Niles
• [x] set up Outdoors basic style
• [x] provide xyz template to Chris
• [ ] add as option to layer picker

[danrademacher]

Turns out Niles already had a style set up. Here's the XYZ:

• [ ] Add new layer https://api.mapbox.com/styles/v1/ecgniles/cirdy2p7r000mh5m5xzg6pplr/tiles/256/{z}/{x}/{y}?access_token=pk.eyJ1IjoiZWNnbmlsZXMiLCJhIjoiY2lyZHkxbmRqMDF5bGc3bTN2ajN0ZmNqbyJ9.29ONxUaTcSYUH3skP_FY1Q

• [ ] Label it "Detailed streets"

• [ ] Add credit: © Mapbox © OpenStreetMap link to: https://www.mapbox.com/about/maps/ http://www.openstreetmap.org/copyright

• [ ] While you're in there, change "positron" to "Grayscale", but to be clear, Positron/Grayscale remains the default map choice. Mapbox Outdoors only as option. That should prevent us having to revisit route colors, legend, etc.

[clhenrick]

implemented in e1be09e