Merge remote-tracking branch 'tjoppen/proper_mxf_track_linking'

* tjoppen/proper_mxf_track_linking:
  mxfdec: Don't parse slices or DeltaEntryArrays
  mxfdec: Remove dead/useless code
  mxfdec: Hybrid demuxing/seeking solution
  mxfdec: Add mxf_edit_unit_absolute_offset()
  mxfdec: Replace zero IndexDurations with st->duration
  mxfdec: Add "fake" index to MXFIndexTable to assist seeking
  mxfdec: Add MXFIndexTables
  mxfdec: Move mxf_read_packet*() near the bottom of the file

Merged-by: Michael Niedermayer <michaelni@gmx.at>