Add -m, --multiprocess option which forks a handler for each
connection allowing multiple connections to the same target using the
same proxy instance.
Cleaned up the output of the handler process. Each process' output is
prefixed with an ordinal value.
Changed both the C and python versions of the proxy.
Pull in LGPL md5.c and md5.h files (written by Ulrich Drepper).
Now both python and C version of the proxy support both protocol 75
and protocol 76 (hybi 00).
Reorganize websocket.py slightly to match websocket.c.
