Also allow for input of coordinates

If the user inputs coordinates, we plot those.
If the user does not input coordinates, we let him/her select them
The function returns coordinates and the line profile of the image along
the coordinates.
Adding "code health" banner

Should help us to keep on top of things automagically
Pep8 existing files, add new ones
Added code health badge.
Only show image if requested
Draw two line profiles at the same location

We draw two line profiles (low resolution and high resolution part of
the resolution phantom) on each image and display it nicely.
Merge branch 'coordinate-line-profile'
Merge branch 'yak-shaving'
Merge branch 'master' of github.com:habi/GlobalDiagnostiX
Merge branch 'master' into yak-shaving