Updated MediaElement.js to 2.12.0 (2601db5ebeeaa96b3fa1f1015c494433cbcd9a85)

--HG--
extra : source : 2b385597e4d222df7aad5c4195b4cb686f37171d
Follow-on to ce937201d0eff90178e2c89219e1000fc1175177, update the swf file
to 2.12.0 in sync with vendor.

--HG--
extra : source : 82db4905d278147319e8070b9090aab6b861e1c0
Use HTML::clean() instead of HTML::purify() on the breadcrumb text so
that we show the actual text.  HTMLPurify allows some HTML to render,
but we don't want that here.
Fixes #2072.
Mark Rest_Controller_Test tests as incomplete.
Mark Url_Security_Test tests as incomplete instead of throwing errors.
Revise Tags_Controller_Test - add one more check, change test structure.
Merge pull request #384 from shadlaws/fixes_20130606

Fixes 20130606