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.
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.