CIRIM data reductions: Version control

2000 April 01: first export version.

2000 April 12: corrected bug in DOCIRIM and CIRIM_RFITS. The raw counts need
               to be multiplied by the number of coadds to yield the total
               number of counts before dividing by the exposure time. Not
               doing so yields incorrect photometry in the case where the
               number of coadds is not the same for the entire night.
               This does not affect IRTF data.

               Corrected error in DOCIRIM and DOIRTF affecting the median image
               (image(*,*,3)). The median image was being converted to
               cts/second twice. This did not affect the quality of the image, 
               but lead to incorrect photometry.

               Modified CIRIM_APPHOT to speed up operation when the /CONT
               keyword is specified.

2000 April 17: modified CIRIM_POS so that you are only asked to mark a star on 
               the first image of a sequence, unless /MARKALL is specified.

2000 April 18: documented ADDEXTSOL. 
               Updated ADDEXTSOL to add the aperture correcton file.
               Modified CHEDIT to pass arrays of fields to be changed. This
                  speeds up operations by reading calls to READFITS.
               Modified CIRIM_APPHOT to look for aperture correction file in
                  the .FITS header

2000 April 19: Modified CIRIM_APPHOT and CIRIM_APPHOT_ALL to improve speed
               when extracting multiple sources from the same file.

               Modified APPHOT to give a more reasonable estimate of the 
               errors in the background. This has the effect on increasing the
               size of the error bars to realistic levels. This change was
               motivated by a comparison of the photometry from different
               observations of the same field.

2000 April 20: Corrected bug in CIRIM_STD which could lead to an error of
               up to 50 minutes in the time the standard was observed. It
               affected only images where the UT hours were stored as single
               digits (e.g., 8) when less than 10, rather than as double
               digits (e.g., 08).

               Added some ARNICA standards to CIRIM_STDS.DAT.

2000 April 26: Forced the name of the flat file to be lower case. 
               This affects both DOCIRIM and DOIRTF.
               This was not a problem under VMS.