switch from marked to commonmark parser
use frontmatter, use basic ssi, use basic templating

switch to using son formatted frontmatter for title, date and setting
html layout file to use. allow basic includes of "partials" using Apache
SSI style html comment include directives. Use hairlip for basic "handlebars"
style templating in the html layouts.
Putting it all together, now have a basic, working site generator.