Back to the basics

removed grunt dependencies - will return in the future
removed the need for all the icons and startup images in meta
removed style guide - will return
removed google analytics tag
removed unnecessary <meta> tags

refactored most of the head includes

added page template
added google analytics universal tag
added critical/non-critical css system
added cssLoader for crit/non-crit css
added prefix free js - replace when building production
added classList polyfill/test

updates still to required
- resources
- humans.txt
- template.txt
- readme.md
Merge branch 'v3'