- Add an ``asyncore_loop_timeout`` adjustment value, which controls the
  ``timeout`` value passed to ``asyncore.loop``; defaults to 1.

- The default asyncore loop timeout is now 1 second.  This prevents slow
  shutdown on Windows.  See https://github.com/Pylons/waitress/issues/6 .  This
  shouldn't matter to anyone in particular, but it can be changed via the
  ``asyncore_loop_timeout`` adjustment (it used to previously default to 30
  seconds).

Closes #6.