Checking in changes prior to tagging of version 0.13.

Changelog diff is:

diff --git a/Changes b/Changes
index 1e7d8da..a7f2a39 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 Revision history for Perl extension CGI::Header.

+0.13  Jan 8th, 2012
+
   - clear() and each() return the current object itself
   - set() returns the given value:
       $header->set( 'Foo' => 'bar' ); # => "bar"
Checking in changes prior to tagging of version 0.14.

Changelog diff is:

diff --git a/Changes b/Changes
index a7f2a39..47ba48e 100644
--- a/Changes
+++ b/Changes
@@ -1,6 +1,22 @@
 Revision history for Perl extension CGI::Header.

-0.13  Jan 8th, 2012
+0.14  Jan 9th, 2013
+
+  - set() and delete() throw exceptions when the specified header field
+    is read-only.
+  - get() returns undef in the following situations:
+
+      $header->header; # => { -expires => q{}, ... }
+      $header->get( 'Expires' ); # => undef
+
+      $header->header; # => { -p3p => q{}, ... }
+      $header->get( 'P3P' ); # => undef
+
+  [INTERNALS]
+
+    id() is aliased to Scalar::Util::refaddr()
+
+0.13  Jan 8th, 2013

   - clear() and each() return the current object itself
   - set() returns the given value:
@@ -17,7 +33,7 @@ Revision history for Perl extension CGI::Header.

     Add "Server" and "Date" to "LIMITATIONS"

-0.12  Jan 7th, 2012
+0.12  Jan 7th, 2013

   [INTERNALS]
     - Rename _normalize() to _lc()
Checking in changes prior to tagging of version 0.15.

Changelog diff is:

diff --git a/Changes b/Changes
index 47ba48e..4665633 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,17 @@
 Revision history for Perl extension CGI::Header.

+0.15  Jan 11th, 2013
+
+  Add env() which defaults to \%ENV. new() receives an additional
+  argument which determines the value of the attribute.
+     my $header = CGI::Header->new({ -type => 'text/plain' }, \%ENV);
+     $header->env; # => \%ENV
+
+  [INTERNALS]
+
+    - Add psgi_headers.t which requires CGI::PSGI
+    - new() returns an object based on a blessed hash.
+
 0.14  Jan 9th, 2013

   - set() and delete() throw exceptions when the specified header field