mysite/
    site.py      # site configuration file
    ext/         # extensions directory for plugins
    inc/         # includes directory for menus, etc.
    lib/         # library directory for themes
    out/         # output directory for html files
    res/         # resources directory for static assets
    src/         # source directory for text files

Isn't this way too messy?

What are the advantages of this over the other 1000000 static site generators?