Migrate to OpenStreetMap

[cb-software]

Use the free OpenStreetMap API instead of the Google Maps API. This would eliminate the ugly warnings over the map. Although it wouldn't be Google Maps, the free and open OpenStreetMap should be used instead.

[billyprice1old]

I plus one this ideal

[jopfre]

@obeattie I know you asked for a PR but I would suggest it's a new a project as most of the code is different and it uses a different build process. Perhaps consider forking it instead.

https://github.com/jopfre/osmaps-radius

[cb-software]

A fork has been created.