cache Request->base, URI->new()->canonical is slow
Checking in changes prior to tagging of version 0.21.

Changelog diff is:

diff --git a/Changes b/Changes
index dc10abe..f8b8a83 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Perl extension Kossy

+0.21    Thu Oct 10 15:37:36 2013
+        - [Kossy::Request] cache base() for performance. URI->canonical is slow
+
 0.20    Wed Oct 9 15:46:10 2013
         - separete Kossy::Validator to another dist