[OSM-dev] Structured error messages from API

[Peter Körner]

> You mean showing upload progress in JOSM as opposed to the current
> cylon impression? That could be implemented by counting the number of
> bytes of the osmChange request that have been successfully sent over
> the wire. That's how upload progress bars are usually implemented.
> 
> Obviously the upload could fail but that's another issue.

That looks somehow more intelligent than streaming the progress from the 
server back to the client.

Peter