Have additional statistics per programming language

[sschuberth]

I would be nice to map file extension to programming languages, and then amend the "is mostly responsible for" with something saying e.g. "C++ code". This is useful to identify domain experts for a specific language, esp. when looking at the combined analysis of multiple repositories.

[adam-waldenberg]

Hi. Yes, that might be something fun to add. I'll keep the feature request. It's an easy addition and might serve useful. It might also be interesting to add a toplist of a specific authors most edited languages. That is, instead of just adding one, we add a few.

I'll add it to the todo list :)