Spoortakmodel

[Nozziel]

Added a mapping and inspection classes to work with spoortak model version 3 up to and including version 17

Note the spoortak models data has not yet been included. We are verifying if they can be distributed or not trough github.
Thus the integration tests will fail due to missing data.

[JoostProRail]

Couple of small comments.

[JoostProRail]

Nice that the datasets are included. One concern might be that the repository might become a bit big (the review of the changes was hard to do as git couldn't load all the files) and all the data files will show up in the git log from now on.
It might be preferable to host the data files in some other location, but I agree that this is sufficient for now (also I wouldn't know how to best approach this in the first place).
Approved!

[Nozziel]

It might be preferable to host the data files in some other location,...
Yeah, I've already created an issue for this #23 so we can discuss what we want to do with static data files goin forward.
for there are already 2 files that could not be added due to their sizes (currently they are also not needed)