Checking in changes prior to tagging of version 0.53.

Changelog diff is:

diff --git a/Changes b/Changes
index cbc5f3f..ca6ed42 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,9 @@ Revision history for Perl extension WWW::YouTube::Download

 {{$NEXT}}

+0.53 2013-06-05T16:05:56Z
+        - Various improvements to youtube-playlists (kucharskim++)
+
 0.52 2013-05-05T16:18:54Z
         - Added playlist_id() and video_id() method (kucharskim++)