Awestruct supports the concept of shared skins as the basis of multiple sites within a similarly-designed family.
Within _config/site.yml a skin_dir property may be set. It should
point to a relative directory containing a base awestruct project, known
as the skin.
The skin project may contain an _ext/pipeline.rb which will be appended
to the project's own. Additionally, the skin's _layouts directory
is made available, but layouts contained within may be overridden by
similarly-named layouts contributed by the actual project.
Pages within a skin project also contribute to resulting rendered site.
A skin may use the Partial helper to allow a leaf project to insert partial page fragments into a layout specified by the skin.