Support Overpass API for data downloading

[enzet]

Map Machine fails to download data through OSM API if there too many objects inside the bouding box. We should resolve this by using Overpass API not only for completing incomplete ways but also for requesting simplified OSM data.

E.g., we can use the following filter:

[out:xml][bbox:{{bbox}}];
(
  way["building"];
  way["highway"];
  way["natural"="water"];
  way["waterway"];
  way["natural"="wood"];
  way["landuse"="forest"];
  relation["natural"="water"];
  relation["landuse"="forest"];
);
(._;>;);
out body;