- #136 when we are streaming live and not in dvr mode set the duration to zero in the overridden index handler instead of the metadata callback. dvr mode will have metadata with a duration.

- #70 fixes for live and dvr offset with httpstreaming. don't dispatch start on dvr snap to live, only on metadata or else buffering display stays enabled.

- fixes for osmf class in f4m plugin

#27 regression caused by #550, only stop the player for live streams. caused issues when stopping between playlist items.