Support to exclude from navigation

When defining the folder structure, you can add "ee" to specify that you want that folder to be excluded from navigation.

e.g.
%Yee/%m/%dee

will create a folder with the year (excluded), month (not excluded) and day (excluded)

I decided to use 2 'e', to not interfere with any possible strptime format, or any folder name you would like to use, except of course, your folder name has 2 'e'...