add client-side setup for DJ feature.
send timestamp along with video info so the listener knows the correct offset.
require video title also.
use throttle.io for websocket host
only allow one subscription per broadcast.
worked on the frontend for the dj mode
Merge branch 'dj' of github.com:ledbettj/Tubalr into dj
dj mode ui changes
dry some stuff up
Merge pull request #32 from ledbettj/dj

Dj