Resolve "Process selection logic"

Closes #81 (closed)

added 18 commits

• beca7928...700f188c - 16 commits from branch master
• c2686551 - Merge branch 'master' of gitlab.ikp.kit.edu:AirShowerPhysics/corsika
• 0420d736 - a few merge conflicts

Compare with previous version

mentioned in commit 8498f832

merged