Many Changes

Server.h:
- Added GetPlayer() and GetOnlinePlayers()

Redstone:
- Added more Sounds
- Added Fance Gate

Login:
- Added more Checks
- Added new Yggdrasil Authentication System

Hack Fixes:
- Added BlockChange Radius Check
- Added EntityUse Radius Check

Player:
- Added Dig Stop Packet
- Added Cancel Packets (when the Break cancelled)
- Disable Death from Hunger