Add media module as a dependency

[NormySan]

We rarely builds sites that do not require extended media. Because of this the media module could preferably be installed by default?

It might also be good to add some basic extenstion-modules for the media module like support for images.

[NormySan]

Media is moving to core in the next Drupal release so no need to add the media module anymore. Sites that requires the media module should depend in it manually instead.