"illum_correction.sh": Added checking if ${CHIPGEOMETRY} is being set (including comment).
"illum_correction.sh": Added checking for photometric calibration file
"illum_correction.sh": Added exit statement to query checking if standard catalogue matched catalogues are avaiable.
"illum_correction.sh": Added exit statement to ${CHIPGEOMETRY} checking.
"illum_correction_contourplot_fitfunction.py": Changed x-axis for magnitude-residuals-plot for the second plot (so after fitting) from magnitude BEFORE fitting to AFTER fitting