VRSpace.org

Pushed to ownership-redesign branch.

Essentially ownership needs to be unbound from Client into another relation, and many-to-many. Having many owners allows functions like 'share with', so a handful of users and/or bots can modify some objects, but nobody else.
At this point there's exactly zero benefits from this, so let it remain in the branch until useful.
To make use of it, there need to be some REST controller, blockchain integration etc.

Merged to master, seems to work fine.