Seperated Minecraft and Minetweak logging functions.
Merge remote-tracking branch 'origin/1.6.1' into 1.6.1

Conflicts:
	src/main/java/net/minecraft/server/MinecraftServer.java
	src/main/java/net/minecraft/src/AnvilSaveConverter.java
	src/main/java/net/minecraft/src/ConvertingProgressUpdate.java
	src/main/java/net/minecraft/src/DedicatedServer.java
	src/main/java/net/minecraft/src/NetLoginHandler.java
	src/main/java/net/minecraft/src/NetServerHandler.java
	src/main/java/net/minecraft/src/Packet52MultiBlockChange.java
	src/main/java/net/minecraft/src/PropertyManager.java
	src/main/java/net/minecraft/src/ServerConfigurationManager.java
	src/main/java/net/minecraft/src/ServerListenThread.java