Show upload time in video list.
Merge branch 'list-upload-date' of https://github.com/petterreinholdtsen/fkbeta into petterreinholdtsen-list-upload-date
Added upload date to video-details

List is already crowded and only publication date makes sense
there. It would anyway need some care. We don't want a lot of
numbers and such things on the list page anyway.