Reduction software

The reduction scripts in the IRAF package ``notcam.cl'' have been modified to optionally make distortion corrections on the individual images (after flat fielding and sky subtraction, but before shift and add). The model (available as an IRAF database) will be put in the NOTCam calibration archive for download. It has taken a bit longer than expected to get the upgrade of the IRAF package ``notcam.cl'' to v2.4 finalised with proper documentation and help files, which was considered necessary as we will now make it available for download on our web pages.