Survey images in a directory and compile a list for input to the caldif code.

Usage: calsurvey path num 
arg1 - fullpath to image directory
arg2 - list number (List.num)

[sco@mcs t2]$ calsurvey /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2 1 
8 lrs2 zro ___ List.1

[sco@mcs t2]$ ls
List.1
[sco@mcs t2]$ cat List.1
 lrs2 zro ___ 20160429T084404.9_056LL_zro.fits /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2/20160429T084404.9_056LL_zro.fits
 lrs2 zro ___ 20160429T084404.9_056LU_zro.fits /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2/20160429T084404.9_056LU_zro.fits
 lrs2 zro ___ 20160429T084404.9_056RL_zro.fits /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2/20160429T084404.9_056RL_zro.fits
 lrs2 zro ___ 20160429T084404.9_056RU_zro.fits /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2/20160429T084404.9_056RU_zro.fits
 lrs2 zro ___ 20160429T084404.9_066LL_zro.fits /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2/20160429T084404.9_066LL_zro.fits
 lrs2 zro ___ 20160429T084404.9_066LU_zro.fits /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2/20160429T084404.9_066LU_zro.fits
 lrs2 zro ___ 20160429T084404.9_066RL_zro.fits /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2/20160429T084404.9_066RL_zro.fits
 lrs2 zro ___ 20160429T084404.9_066RU_zro.fits /hetdata/20160429/lrs2/lrs20000106/exp10/lrs2/20160429T084404.9_066RU_zro.fits

The values in List.1 are:
col01 = Instrument name 
col02 = Image type (zro, drk, flt, sci) 
col03 = OBJECT value in the header 
col04 = base image name 
col05 = fullpath image name