Make partest defaults quieter.

Only show failure transcipts under --verbose. Only show individual test
successes under --verbose. Regular verbosity gets a . for each success and a
straight list of test failures at the end of the run.

Chased down a couple other partest annoyances, such as partest-ack counting
(and trying to run) tests more than once. Also cleaned up the orphan check and
flag files people leave lying around when the move tests aside.