Add file to read .RAW images from Aptina

Reading the files via numpy.memmap can destroy the files if one performs
calculations like Image -= numpy.mean(Image), since those changes are
saved to disk immediately... Thus loading the .RAW files via
numpy.fromfile is a better idea.
This tiny script shows how to read the images generated with DevWare for
display or further processing, for example in
"DetectWhichImageIsFocusedBestAndCalculateMTF"...
Ignore temporary Geany files
Correctly calculate MTF

Introducing new definitions to calculate power spectral density,
two-dimensional FFT and MTF.
Now obtaining *much* more images, so we can actually calculate it!