Draft: Including hit-level information in athena (ignore if you're not Dan or Andrea)
this is the first attempt to include the hits in athena. I followed basically the idea to use a new file HitsLoader.cxx, which is build really similar to TracksLoader.cxx. After this I would try to implement this code in GNN.cxx, I made a small change at the point where I think it is necessary.
I tried to have a lot of comments in HitsLoader.cxx, maybe this makes it easy to follow. Happy to hear your feedback, also if I am in the completely wrong direction or somewhat correct...