Made things unique per quadrant, to avoid weird issues when someone adds a thing somewhere;
Set autologin in client, to speed up manual debugging.
Disabled PUT for things.
Made things unique in the db per (name, quadrant) instead of (name), by merging name and quadrant into a single table column
Hand-reverted nonsense with re-adding things from different quadrants. It's too messy.
Made "add thing" work better and simpler;
Refactored thing list into class in separate file.