Changed the CSS/HTML we use for the metrics boxes.

I think this markup is more correct than before.  Using <p> for
"Languages" and <p> for "2" doesn't seem correct to me.  Now we just
have the text inside the DIV/A tag and use a span to signify the
count.
Moved the sharing section below the language list.

Also changed how we handle the language list if there are no subittles
yet.  Instead of displaying tasks and stuff (which are already
displayed above), we always just say "this video doesn't have
subtitles yet."