Checking in changes prior to tagging of version 0.91.

Checking in changes prior to tagging of version 0.91.

Changelog diff is:

diff --git a/Changes b/Changes
index 619c2a9..812203b 100644
--- a/Changes
+++ b/Changes
@@ -1,6 +1,6 @@
 Revision history for Mouse

-(next)
+0.91 2011-03-14 13:12:35
     [CHANGES]
     * $type_constraint->check() accepts extra arguments for extensibility
       (requested by @lestrrat)