Switch from hard-coded directories to what's there
Switch from hard-coded directories to what's there

Reading directories in given base-directory, present those to the user
and let him/her choose.
Read png images (if present) and plot the (normalized) exposure and
(normalized) STD of each image to choose the best focused one.

habi/GlobalDiagnostiX,habi/GlobalDiagnostiX,habi/GlobalDiagnostiX