README.md preparations for publishing on npm. Added info for installation, usage, examples, related links etc.

changed ohsomeQueryConfig type should always use full ohsomeApi path. For backward compatibility /groupBy/boundary will be appended, if missing

extended ohsome-api query types to support point, line and polygon in addition to node, way and relation

Resolve "support contribution view queries, e.g. for users/ requests"

Closes #3

See merge request !1

#3

#3