MTF Reader and Plotter

File (which is derived from MTF.py) used to read an image, theoretically with a knife-edge-step in it.
From this knife-edge we then calculate the MTF. At least that's what it's going to do when finished, still working on it.
Sync the data to the correct AFS-directory
Give out maxima of the lineprofiles, so we can start to calculate the MTF
MTF_reader_and_plotter.py updated

- Some more options at the beginning
- User can either select coordinates for edge-plotting or use predefined ones
- User can either select biggest step or let the script calculate the knife-edge from  the (firs) derivative
- Acutally plotting LSF and MTF