103.2

[Matthew Flatt <mflatt@cs.utah.edu>]

In the CVS repository, the exp-tagged MzScheme and MrEd code is now
version 103.2.

The only significant change is that, in Windows and Unix,
MzScheme-implemented threads swap roughly every 10ms, instead of
roughly every 10,000 non-primitive applications. Beware --- this change
change can uncover long-standing bugs in multi-threaded code that the
old policy would never trigger.

[Why change now... instead of five years ago? In the early days, using
timers seemed like too much platform-specific work, and that initial
impression stuck. Of course, it's actually relatively straightforward,
at least compared to all the platform-specific code we currently
maintain.]

Other changes:

 * MrEd Windows: fixed dialog% bugs introduced in 103.1.

 * 2k: some bug fixes, performance tuning.

Matthew