Updating DoseCalculation to be more clever
Updating DoseCalculation to be more clever

Using OptParse to load a certain kV-setting, informing user when a
non-specified setting is chosen.
Loading all the spectra we have from disk and put them in a list, so we
can choose easily.
Calculating the number of emitted photons and dose more cleverly with
the given input parameters.

habi/GlobalDiagnostiX,habi/GlobalDiagnostiX,habi/GlobalDiagnostiX