Reduces visibility of internal fields/methods

Reduces the visibility of all fields to private and create setters/getters
when necessary. Exceptions are fields with GuiSync as these need to be
public.

Reduces the visibility of internal methods to private/protected/default when possible.

src/main/java/appeng/server/subcommands/ChunkLogger.java

@@ -34,7 +34,7 @@ import appeng.server.ISubCommand;
 public class ChunkLogger implements ISubCommand
 {
 
-	boolean enabled = false;
+	private boolean enabled = false;
 
 	@SubscribeEvent
 	public void onChunkLoadEvent( final ChunkEvent.Load event )