Refactored AEConfig (#2633)

Added a singleton getter instead the public field.
Reduced all fields to private.
Replaced field access with getters.
Added setters where necessary (Dimension/Biome Registration)
Added config options to disable more features.
Splitted Enum name from the config key.
Changed FacadeConfig and Networkhandler similar to AEConfig.init().

src/main/java/appeng/items/tools/ToolNetworkTool.java

@@ -122,7 +122,7 @@ public class ToolNetworkTool extends AEBaseItem implements IGuiItem, IAEWrench /
 
 		if( Platform.isClient() )
 		{
-			NetworkHandler.instance.sendToServer( new PacketClick( pos, side, hitX, hitY, hitZ, hand ) );
+			NetworkHandler.instance().sendToServer( new PacketClick( pos, side, hitX, hitY, hitZ, hand ) );
 		}
 
 		return EnumActionResult.SUCCESS;