NAME:
  rdtbl
 PURPOSE:
  Read the data from the table file from one night of OSIRIS observations
 DESCRIPTION:
  The table file is read one line at a time and then disected into the various
  pieces of information in the form of arrays.  These arrays are then saved in
  a structure.
 CATEGORY:
  File I/O
 CALLING SEQUENCE:
  rdtbl,tablname,tbl
 INPUTS:
  tablname - The name of the table file to be read
 OPTIONAL INPUT PARAMETERS:
 KEYWORD INPUT PARAMETERS:
 OUTPUTS:
  tbl - Structure containing the information from the table file
 KEYWORD OUTPUT PARAMETERS:
 COMMON BLOCKS:
 SIDE EFFECTS:
 RESTRICTIONS:
 PROCEDURE:
 MODIFICATION HISTORY:
  98/06/10 - Written by Chris Dalla Piazza, Lycoming College; extracted from
             xdspec
  2002/09/03, MWB, changed Str_sep call to strsplit