Add logging during --finish and --analyze step

[Ayaz Salikhov]

These steps do take some time. Especially --finish one.
It will be useful to see which file takes a lot of time, which file is getting parsed right now and so on.

[Aras Pranckevičius]

Is this still needed with #37?

[Ayaz Salikhov]

Actually, right now I have 3 warnings like this:
WARN: JSON parse error Something went wrong while writing to the tape.

So, it may be not a bad idea to add some logging.