[TASK] Move media libraries to EXT:mediace

Files related solely to the media Content Element
are moved from typo3/contrib/ to the
extension itself.

Resolves: #65417
Releases: master
Change-Id: I8223f204ccf35c4f4399760da90a90d6a7d1e46d
Reviewed-on: http://review.typo3.org/37367


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>