README: add Table of Contents

- generated with [DocToc](http://doctoc.herokuapp.com/)
- edited manually (tabs wtf?)
docs: add sketches to show template structure
footer: add 'plain' link
header: .email => .contact
README: small clarity edit
navigation: #refactor, use ol for all levels
css: add stylesheet micro-framework
css: lib: import normalize.css at v3.0.0 (from bower)
rename page-navigation => category-navigation