NAME:
  loadkeys
 PURPOSE:
  Load FITS header keyword correspondence list from file.
 DESCRIPTION:

 CATEGORY:
  File I/O
 CALLING SEQUENCE:
  loadkeys,keyfile,keylist
 INPUTS:
  keyfile - string with file name to load, if '[[DEFAULT]]', doesn't load
              a file but will return a default list.
  keylist - string array
 OPTIONAL INPUT PARAMETERS:

 KEYWORD INPUT PARAMETERS:

 OUTPUTS:
  keylist - 3,n element string array.  For each key, there are three elements:
                0 - "standard" key name
                1 - item descriptor, K - keyword, T - template, V - value
                2 - information (contents match what descriptor indicates)

 KEYWORD OUTPUT PARAMETERS:
 FOUNDIT - Flag, true if key file found, false if not.  It's up the to the
            calling program to decide if this is a problem or not.

 COMMON BLOCKS:

 SIDE EFFECTS:

 RESTRICTIONS:

 PROCEDURE:

 MODIFICATION HISTORY:
  97/06/12, Written by Marc W. Buie, Lowell Observatory
  97/07/21, MWB, added RA, DEC
  2004/05/24, MWB, added FOUNDIT keyword
  2007/10/02, MWB, changed DATETMPL in default list.