Checking in changes prior to tagging of version 0.10.

Changelog diff is:

diff --git a/Changes b/Changes
index 6aed01c..4eb15a2 100644
--- a/Changes
+++ b/Changes
@@ -1,6 +1,6 @@
 Revision history for Algorithm::HyperLogLog

-0.10    Wed Apr 03 23:15:00 2013
+0.10    Wed Apr 03 22:15:00 2013
         - [enhancement] register dump/restore feature
         - [bugfix] hash calculation error in big endian environment