Add the b'' literal to the hardcoded first message from the game server.
Make addByte-like operations on network messages actually add a byte,
not a character.
Replace string operations with buffer-based ones in NetworkMessage
routines.
Make server's game protocol's main loop operate on byterrays, not
strings.
Make the U32 class work under Python 3.
Add a more verbose comment on what debug in config.py does.
Make debug mode on by default so that I don't need to restore it
everytime I do git stash.
Reorder the imports.
In case of an exception in debug mode, drop into the debugger.
Add doctests for XTEA.