config file should include "exclude directory" option

[alperyilmaz]

It would be nice to exclude some subdirectories (in my case ".meta") so that the txt or md files under this folder should not be searched and listed.. may be it's an easy fix but I dont know Python.. sorry..

Edit: I was using the pip install version which didn't have exclude option. Later I noticed the latest version in repo had that option. So, nevermind my comment.