Adapted the world to the new VFile.py.  Fixed bugs in Vplay.py:
missing -n in help(), bogus frame skipping; and added patch for
weird time jumps.  Removed colorsys.py (now in std library).
Fixed "sys.write" error in vcopy.py.  Restructured README.
diff --git a/Demo/sgi/video/vcopy.py b/Demo/sgi/video/vcopy.py
index 1842094..fe012ea 100755
--- a/Demo/sgi/video/vcopy.py
+++ b/Demo/sgi/video/vcopy.py
@@ -10,7 +10,7 @@
 	print 'Frame', iframe, ': t =', time
 
 def usage():
-	sys.write('usage: vcopy infile outfile\n')
+	sys.stderr.write('usage: vcopy infile outfile\n')
 	sys.exit(2)
 
 def help():