change file stat timing (measures under high load)
Checking in changes prior to tagging of version 0.04.

Changelog diff is:

diff --git a/Changes b/Changes
index ae9cb77..67ca302 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Perl extension ExclusiveLock::Guard

+0.04    2013-01-21T19:21:15+09:00
+        - change of the file stat timing (measures under high load)
+
 0.03    2012-11-08T21:57:01+09:00
         - fixed to It had overlooked that inode of lock file had changed