The zen and zen-based themes are very customizable, so to make these themes
work, you have to use the sample config file. The theme uses Font Awesome v5
icons.

More info about the zen themes family [here](http://www.damian.oquanta.info/posts/nikolas-zen-theme-finally-released.html).

Enjoy!

Damián

**WARNING:** The themes use Less for their styles, but you don't need a Less compiler installed to use it.