Modularize python code

[WesleyTheGeolien]

Is your feature request related to a problem? Please describe.
Having a GUI is great but being able to run the code / script the code outside of the GUI environment would be useful / desirable.

The code is somewhat written using a model / view architecture meaning that the logic is separated from the viewing code.

We could take this one step further and make sure the python code is a module that can be used from outside.

Equally it may be possible to use Conda to package the (some) fortran routines so they become locally useable as well?

It would be great to get your thoughts on this @PBrockmann