change stay time to max of track0 and track1 duration - not min of each - self.transition_time * 3
abridge takes singe track now.
append_support moved and imported into mixer
inter is full track length - no longer  - self.transition_time * 3
import from action, not echonest.remix.action.
send track 0 and 1 to abridge for dev purposes.
make transition use hard_transition instead of crossmatch or crossfade.