Create an embeddable version of the app that strips away some UI

[hathix]

People like SFTR (and our site) want to embed our tool on their site. But our app doesn't do that well in very small boxes because of all the extra UI elements around the sides:

We should have a special URL flag that hides some of the UI and makes it more embeddable.

[hathix]

The behavior would have to be a bit different on the isochrone and homepage and trips page. Also you'd have to have a button (perhaps in the share menu that is being built in #570?) to get an embed link.