VFile: added new formats 'jpeg' and 'jpeggrey'.  Decompression is done
using module 'jpeg' by the Displayer class.  (Unfortunately it's too
slow for real time.)  Print file size in printinfo() method.

Vinfo: added -t option (terse -- one line per file) and usage message.

Vtime: use BasicV{in,out}File classes -- the minimum needed.

Vmkjpeg, Vunjpeg: new utilities for jpeg (de)compression.
diff --git a/Demo/sgi/video/Vtime.py b/Demo/sgi/video/Vtime.py
index 3096ce1..321e233 100755
--- a/Demo/sgi/video/Vtime.py
+++ b/Demo/sgi/video/Vtime.py
@@ -65,7 +65,7 @@
 
 def process(infilename, outfilename):
 	try:
-		vin = VFile.VinFile().init(infilename)
+		vin = VFile.BasicVinFile().init(infilename)
 	except IOError, msg:
 		sys.stderr.write(infilename + ': I/O error: ' + `msg` + '\n')
 		return 1
@@ -77,7 +77,7 @@
 		return 1
 
 	try:
-		vout = VFile.VoutFile().init(outfilename)
+		vout = VFile.BasicVoutFile().init(outfilename)
 	except IOError, msg:
 		sys.stderr.write(outfilename + ': I/O error: ' + `msg` + '\n')
 		return 1