v2.19.rc5

• support play from live DVR on iOS and Safari
• When live broadcast stops, the player is stuck on loader until moving the DVR seek.
• fix broken kplayer when mediaProxy.mediaPlayFrom is set
• Support streamerType "hls" in chromeless Flash player
• Player - Playlist
• don't set duration when playing native hls
• fix exception if no kalturaPlayerMetadata exists