Added the installation result codes from the Windows Update Agent (WUA COM Object)

++        The installation result codes from the Windows Update Agent
(WUA COM Object) are:
+
+        Exit Codes:
+            0 = scripting failure
+            1 = error obtaining or installing updates
+            2 = installation successful, no further updates to install
+            3 = reboot needed; rerun script after reboot
++
+        The installation result codes from the Windows Update Agent
(WUA COM Object) are:
+
+        Exit Codes:
+            0 = scripting failure
+            1 = error obtaining or installing updates
+            2 = installation successful, no further updates to install
+            3 = reboot needed; rerun script after reboot
+