Checking in changes prior to tagging of version 0.11.

Changelog diff is:

diff --git a/Changes b/Changes
index 3f5605d..26e8ea0 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 Revision history for Perl extension CGI::Header::PSGI.

+0.11  Apr 12th, 2013
+
   - Requires CGI::Header 0.47 or higher

 0.10  Apr 11th, 2013
"cookie" -> "cookies"