Minecraft Mod Updater

This is just an update to ensure all stays working with the new Minecraft 1.3 update released today.  Servers now have the option to downgrade clients to Minecraft 1.2.5.  This helps for servers that have many mods and don’t have the option to update yet.

Changelog:

Client:

1. Added ability for server to downgrade Minecraft client from 1.3 to 1.2.5.

Server:

1. Added ability to downgrade Minecraft client from 1.3 to 1.2.5.  Set flag ClientVersion in Config.xml to 1.2.5.

API:

1. FilePartPacket now waits until data is received on the other end to exit out.  This is a feature I might be adding to other packets in the future.