calcos v3.2.1 rc1 for dms2017.2

#CALCOS Version 3.2.1

• Updated code to be compatible with latest version of astropy and numpy

  • Replaced astropy.io.fits new_table() calls with BinTableHDU.from_columns()
  • Checked that numpy indices are integers

• Added DGEOCORR step

  • Applies delta geometric correction
  • Uses new DGEOFILE reference file
  • Requires DGEOCORR header keyword

• Added XWLKCORR and YWLKCORR steps, removed WALKCORR step

  • Applies X and Y walk corrections separately, using a lookup table reference file instead
    of a polynomial calculation
  • Uses XWLKFILE and YWLKFILE reference files
  • Requires XWLKCORR and YWLKCORR header keywords
  • WALKCORR and WALKTAB keywords now obsolete

• Added capability to set N_SIGMA for wavelength calibration in wcptab reference file

  • wcptab reference file has new column N_SIGMA

• Fixed bug in DQ calculation when twozone extraction is used

  • Affected ends of the spectrum when multiple fp-pos positions used