Repeat & Speed buttons for Vimeo HTML5 video
Adds 2 buttons to Vimeo's HTML5 video player:
* REPEAT -- Good song? Click & enjoy
* SPEED (playback rate) -- Pesentation too slow? Set speed to 1.5
Bug with sometimes showing buttons twice and sometimes not at all.
+support for embedded vimeo (on player.vimeo.com).
Use onTimeUpdate instead of onEnded, to listen to before-the-end, to make it work in playlists etc.