Add support for OSM scout server

[dcaliste]

Add a tile source using OSM scout server.

Adapt also address search and POI to use OSM scout server.

[rinigus]

Hi! Let me know if there are any issues with adding OSM Scout Server support. Ideally, you would request the tiles that are larger than 256x256 size, something like 1024x1024. This would allow to render the tiles more efficiently since the border region would contribute less to overall rendering.

As for Search and POI, there are no "hidden" optimizations to do.

Thank you for considering adding the support for the server :)

[dcaliste]

Hello Rinigus, thank you for your great job on Scout Server. I'm following your repo and see how dedicated you are.

I'm currently reworking the source management in Mæp, as you may have seen on the recent commit. Next one will be the ability for users to add custom tile source.

I see your point about tile size. Currently tile size is hard coded but that should be simple to make it customizable, and a good exercise.

I won't hesitate to contact you in case I encounter issues. Thank you for your job.