Update README for V2.1.1

Author: Robin "sumghai" Chang

GameData/SDHI/Service Module System/SDHI_SMS_README.txt

@@ -1,6 +1,6 @@
 Sum Dum Heavy Industries Service Module System - Mod Parts Pack
 
-Version:	2.1	(KSP 0.24.2)
+Version:	2.1.1	(KSP 0.24.2)
 
 Author: 	Robin "sumghai" Chang	grnlead@hotmail.com
 
@@ -70,6 +70,13 @@ If you have other SDHI part packs you wish to keep, just remove the Service Modu
 
 
 ===Release Notes===
+2.1.1        21 August 2014
+---------------------------
+
+Changes / Fixes:
+ - Fixed TAC Life Support patch so that it only applies if TAC LS is actually installed.
+
+
 2.1          7 August 2014
 ---------------------------