Update MediaElement.js to 2.13.0 build, which fixes issues WordPress reported. see #24183.

git-svn-id: https://develop.svn.wordpress.org/trunk@24946 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/js/mediaelement/mediaelement-and-player.min.js

@@ -10,7 +10,7 @@
 * Copyright 2010-2013, John Dyer (http://j.hn)
 * License: MIT
 *
-*/var mejs=mejs||{};mejs.version="2.12.1";mejs.meIndex=0;
+*/var mejs=mejs||{};mejs.version="2.13.0";mejs.meIndex=0;
 mejs.plugins={silverlight:[{version:[3,0],types:["video/mp4","video/m4v","video/mov","video/wmv","audio/wma","audio/m4a","audio/mp3","audio/wav","audio/mpeg"]}],flash:[{version:[9,0,124],types:["video/mp4","video/m4v","video/mov","video/flv","video/rtmp","video/x-flv","audio/flv","audio/x-flv","audio/mp3","audio/m4a","audio/mpeg","video/youtube","video/x-youtube"]}],youtube:[{version:null,types:["video/youtube","video/x-youtube","audio/youtube","audio/x-youtube"]}],vimeo:[{version:null,types:["video/vimeo",
 "video/x-vimeo"]}]};
 mejs.Utility={encodeUrl:function(a){return encodeURIComponent(a)},escapeHTML:function(a){return a.toString().split("&").join("&amp;").split("<").join("&lt;").split('"').join("&quot;")},absolutizeUrl:function(a){var b=document.createElement("div");b.innerHTML='<a href="'+this.escapeHTML(a)+'">x</a>';return b.firstChild.href},getScriptPath:function(a){for(var b=0,c,d="",e="",f,g,h=document.getElementsByTagName("script"),l=h.length,j=a.length;b<l;b++){f=h[b].src;c=f.lastIndexOf("/");if(c>-1){g=f.substring(c+