Barnabás Zahorán

Initial implementation of type McCabe (#683)

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Work in progress. TODO checklist: - [x] Write tests - [3fdb63c](https://github.com/Ericsson/CodeCompass/pull/727/commits/3fdb63c4c06783e883f654f5fd285bc566239ec7) - [x] Handling of nested classes - [x] Wait for decision on handling of template classes - [0bf929a](https://github.com/Ericsson/CodeCompass/pull/727/commits/0bf929af35737f46615d9a8236ccbe5cf08092fd) -...