This introduces a new media manager and media revisions to DokuWiki. The
changes have been implemented by Kate Arzamastseva and are the
result of a Google Summer of Code project, the official project page can
be found at
http://www.google-melange.com/gsoc/project/google/gsoc2011/kate/18001

Thanks to Kate for the work and Google for sponsoring it!

This reverts commit ba6c070e.
This reverts commit 92351008.

Pulled the current jquery-cookie version from https://github.com/carhartl/jquery-cookie.

  * <sup> elements are only removed from the start of a footnote
  * the TOC wrapper instantly gets the target size to reduce layout jumping

Since 80997d21 the date passed to the
draft save backend is indeed the page id, not the date.

Fix permission and existence check for the recent changes

Before it was possible that changes for media files the user can't
access were shown if the user could access a page with the same name.
This also reverts the file existence check so it now really checks for
media changes that the media file exists and for page changes the page
and that not one of the two suffice for both.

As we need to keep all core meta files anyway (the only core file that
had been deleted but shouldn't be deleted is the .indexed file) and
plugins can keep care of their own metadata files using the
IO_WIKIPAGE_WRITE event there is no reason for using the expensive
metaFiles() function during the deletion of pages.