The default 10s timeout can be too low when creating large tables on
slow devices. This patch just uses the already-defined default of
60s for that operation.

This version and the previous one are wire compatible, the only code
chance reflects a naming change in the client API.

Replaces numeric status codes with a canonical set of Status objects,
each with a short name and description.
Bindings with more specific errors (e.g., timeouts) return additional
statuses.

This changes the default output from messages like:

   [UPDATE], Return=0, 511

To:

   [UPDATE], Return=OK, 511

Currently doesn't include unit tests since we don't have mock objects for that.