[Twisted-Python] Moving sandbox out of the trunk.

[Tommi Virtanen]

Tommi Virtanen wrote:

> I think other people's sandbox changes just clutter up "svn st -u" and
> "svn log", sandbox isn't really part of the twisted project (should not
> get included in released source; should not get tagged; should not
> get branched), and say 80% of the people co'ing trunk have no interest
> in the sandbox (and when they have, it's easy to co when really wanted).

Also, sandbox changes trigger buildbot, adding noise to the waterfall.