Checking in changes prior to tagging of version 0.59.

Changelog diff is:

diff --git a/Changes b/Changes
index d851157..75794de 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 Revision history for Perl extension CGI::Header.

+0.59 (1.00-RC12) Jun 11th, 2013
+
   - Remove CGI::Header#redirect and location

 0.58 (1.00-RC11) Jun 5th, 2013