[docs] Fix assets static path

put ../ for jekyll load assets
Update src/molecules/codrops-navigator.less

add .link-submenu-item class
[docs] Fix relative load assets

add three levels of assets load
[docs] Init atoms/global/mixins.html
[docs] Init atoms/global/responsive.html
[docs] Init atoms/global/scaffolding.html
[docs] Init atoms/global/theme.html
[docs] Init atoms/global/utilities.html
[docs] Init atoms/global/variables.html
[docs] Update _includes/navigator.html

add atoms/global/~ menu links
[docs] Update _includes/navigator.html

add home link