Added bug.py and condition.py

Demo/threads/README

 This directory contains some demonstrations of the thread module.
-This module is only (optionally) available for the SGI, for now.
+This module is only available, optionally, for a few platforms: SGI
+IRIX 4 and IRIX 5, SunOS 4 (not completely functioning), Solaris 2,
+and supposedly any platform that supports Posix Threads (currently
+only tested with KSR's implementation).  See ../../Python/thread.c.
 
 These are mostly "proof of concept" type applications:
 
-find.py		Parallelized "find(1)".
+bug.py		Demonstrate a bug with importing modules in threads.
+condition.py	Condition variables test by Tim Peters.
+find.py		Parallelized "find(1)" (looks for directories).
 Generator.py	Generator class implemented with threads.
 telnet.py	Version of ../sockets/telnet.py using threads.
 wpi.py		Version of ../scripts/pi.py using threads and stdwin.