Added -d option: print deltas instead of absolute times.

data unprocessed in memory.  As long as memory doesn't run out this
gets us 19 frames/sec!
Also many cosmetic changes.

Allow numbers starting with a period.

Added NULL function pointers for shift and mask ops.

Added hex() and oct().

Changed some conditional INCREFs into XINCREFs.

Made some routines a little bit more robust.

in err_errno().

Also added functions (un)packrect, not in GL but needed for tv...
Commented out all the functions that cause error messages.