Checking in changes prior to tagging of version 0.11.

Changelog diff is:

diff --git a/Changes b/Changes
index 4eb15a2..efb45a9 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Algorithm::HyperLogLog

+0.11    Fri Apr 05 01:40:00 2013
+        - XSLoader is loaded when runtime
+
 0.10    Wed Apr 03 22:15:00 2013
         - [enhancement] register dump/restore feature
         - [bugfix] hash calculation error in big endian environment