move non-standard templates into `snippets`
adds custom helpers and utils
rename _config.yml to `.assemblerc.yml` and organize the data
housekeeping, update dotfiles
update data files to work with new helper methods, add data utils to automatically pull down less.json (package.json from less.js)
move plugins, rename toc.js to navigation.js
adds a several new less components, updates styles
adds grunt-contrib-less and gulp-less to `third-party-compilers.md`
some changes to site layout, templates (header is gone)
update navigation plugin so that anchors are automatically generated for headings using the same ids as the nav.
rename font path
updated the site to include "source link" popovers, improved styling in documentation area