[Python-3000] Python 3.0a2 release

["Martin v. Löwis"]

> A word of warning. The PGInstrument builds are *very* slow compared to
> normal builds. The bench mark and test suite need about *TEN* times the
> time to run.

That's also an issue - releases typically occur under time pressure,
trying to get everything done in a single day. If I prepare the
instrument build in advance, how long can I continue to use the data
before they get outdated?

Regards,
Martin