o Fixed missing-index-partion bugs for AS-02 files.

  o Fixed missing-index-partion bugs for AS-02 files.
  o Improved integration of ST 377-4 MCA concepts with ST 429-2 static
    labels.
  o Added new EssenceType_t values for IMF/AS-02 track files.
  o Added detection for AS-02 track files to ASDCP::EssenceType()
  o Changed lots of "const char*" to "const std::string&" in the
    APIs defined by KM_fileio.h and AS_DCP.h.
  o Fixed VBR Delta Segment entries to correctly flag progressive
    material.
  o Fixed PCM unwrapping bugs in as-02-unwrap.