Deleting unnecessary directories and files

If requested, the script deletes unnecessary files (more than 5 images
away from the image with the largest mean) and directories containing
only images with an irrelevant mean.
Updated files for ProgressReport

Cosmetic changes to RadiographyDetector
DoseCalculation should give the number of Photons, but still needs some
major work to correctly calculate it.
Added two files for GOTTHARD analysis/plotting.
GOTTHARD/Photon-Calculation.py should correct for the attenuation and
calculate how many photons we have present.
GOTTHARD/PlotGOTTHARD.py plots the data from Sebastian, so we can
integrate it into the ProgressReport