Refactor header
Remove body's class 'page-home'

* Since this is the default layout, `page-home` was making it semantically wrong
Refactor contact page

* Remove unnecessary/not well named classes
Refactor index page

* Simplify code by removing unnecessary classes
Update script to work with new named classes
Refactor styles

* Remove unnecessary/unused styles
Remove unused css
Merge branch 'refactor'

Conflicts:
	_includes/header.html
	contact.html
	index.html