Checking in changes prior to tagging of version 0.45.

Changelog diff is:

diff --git a/Changes b/Changes
index 4e69986..3e7b208 100644
--- a/Changes
+++ b/Changes
@@ -1,11 +1,14 @@
 Revision history for Perl extension CGI::Header.

-  - Add CGI::Header::PSGI to this distribution
+0.45  Apr 10th, 2013
+
+  - Add CGI::Header::PSGI to this distribution and rewrite the module
+    entirely.

   [INCOMPATIBLE CHANGES]

     - Rewrite test suite entirely
-    - Remove flatten() and as_hashref()
+    - Remove flatten() and as_hashref() from CGI::Header

 0.44  Apr 9th, 2013