Checking in changes prior to tagging of version 0.81.

Checking in changes prior to tagging of version 0.81.

Changelog diff is:

diff --git a/Changes b/Changes
index 35d6284..0c3722a 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,9 @@
 Revision history for Mouse

+0.81 2010-10-28 21:49:40
+    [BUG FIXES]
+    * Roles which attributes has no methods could affect cache invalidation
+
 0.80 Wed Oct  6 00:15:49 2010
     [BUG FIXES]
     * Resolve RT #61906 (Syohei Yoshida): A single 'accessor' did