Checking in changes prior to tagging of version 0.03.

Changelog diff is:

diff --git a/Changes b/Changes
index a47b637..68350c1 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Algorithm::HyperLogLog

+0.03    Thu Mar 21 03:15:00 2013
+        - Remove unnecessary code in XS
+
 0.02    Wed Mar 20 16:10:00 2013
         - Improve Windows(MSVC) support