dash.encrypt-1.1.1

• this release aligns the media presentation time line so that the earliest presentation time of any track is zero (and never negative)
• better support for mov files (most should work - no guarantee)
• sparse encryption:
  • -s=0: all samples encrypted (default setting)
  • -s=1: samples are encrypted by default but certain samples are not
  • -s=2: certain samples are encrypted but default is clear.