Interoperability with logger

[michalwski]

I can see there is a branch adt/lager_use_logger-option, which as far as I understand helps to integrate Erlang's built in logger with lagger.
Are there any chances to get this branch merged with master? What needs to be done (if anything) before the merge?

[Vagabond]

I've been sadly too busy to finish it. I think there's still a few rough edges. Maybe try it out and see how it works?

I'm not sure when I'm going to have time to finish it off at this point, so any help is most welcome.