add lock_guard()
Checking in changes prior to tagging of version 0.01.

Changelog diff is:

diff --git a/Changes b/Changes
index 73348f9..2ffbfc3 100644
--- a/Changes
+++ b/Changes
@@ -2,5 +2,7 @@ Revision history for Perl extension Redis-Setlock

 {{$NEXT}}

+0.01 2014-01-31T07:39:45Z
+
     - original version