cat_Intan_RHD2000_files

  CAT_INTAN_RHD2000_FILES - Concatenate multiple RHD files together

  STATUS = CAT_INTAN_RHD2000_FILES(FILENAME1, FILENAME2, ...)

  Concatenate multiple RHD files together. Produces a large file
  named ['cat' FILENAME1]. Note that the filename information in the
  header of ['cat' FILENAME1] will still be FILENAME1.

  STATUS should always return 0 if there was no error.

  See also: READ_INTAN_RHD2000_DATAFILE, READ_INTAN_RHD2000_HEADER