exp/upbox, exp/cmd/upbox: move out of exp directory

Now that upbox is used by the tests in cmd/upspin, it should no longer
be considered experimental.

Change-Id: Ic52f4d63b801152b43dde29f62e676d2891e5261
3 files changed
tree: ed261bba062f1308b0e4ab4d12ceeae540906503
  1. README.md
  2. client/
  3. cmd/
  4. filesystem/
README.md

Experimental components

This directory contains components that are experimental or under development.