Checking in changes prior to tagging of version 0.02.

Changelog diff is:

diff --git a/Changes b/Changes
index bdae5ee..70aa627 100644
--- a/Changes
+++ b/Changes
@@ -1,4 +1,7 @@
 Revision history for Digest::MurmurHash3::PurePerl

+0.02    Sun Jun 16 23:15:00 2013
+        - Fixed bit operation bug in 32-bit environment
+
 0.01    Sat Jun  8 16:14:58 2013
         - Initial release