Feature request: Introduce cyclomatic complexity as file metric

[ResistantBear]

Introduce the calculation of the actual cyclomatic complexity on function level. Include aggregations (maximum, average and median) of this value as file metric.

Also including the metric value for each function would be a separate issue, as that would require changes to our current JSON-output to support function metrics.

See our discussion here for further details: #41

[ce-bo]

This feature request could be implemented at a later stage. Let's not move it to our Backlog and keep it as priority low.

[ResistantBear]

Alright, I opened it because this feature was requested on friday. It should be pretty straight forward to implement once we decide to do it.