* Replaced %8 with &7 in BitStream.cpp. Thanks to Oliver Smith for
pointing this out. It's a great optimization as it is correct, has no
drawbacks, and can significantly improve speed.
* Changed offline pings to be totally offline, rather than connecting
and then disconnecting. This might fix the reported bug with pinging
and not being able to reconnect.
* Reordered packet enumerations so that the most commonly used ones are
first. This means this version is not backwards compatible
