New version aims to simplify main vault and support deeper merging
strategies.  We'll see...

Here you can add vim overrides that you need to exclude from Github.

Of course, this *will not work* for other sharing mechanisms like Dropbox.

*   if dotfiles are shared by git, it will ignore
    all files under dotfiles/git-universe/private

*   if you use other sharing mechanism, you need
    to exclude these files other way