http://yoksel.github.io/flex-cheatsheet/
http://callmecavs.com/bricks.js/
http://csstriggers.com/
http://clippings.github.io/layout-grid/
http://deercreation.fr/article/creer-une-grille-css-responsive
https://developers.google.com/web/starter-kit/
http://gridster.net/
http://isotope.metafizzy.co/
http://www.layoutit.com/
http://www.deploydjango.com/django_project_structure/index.html
http://css.alsacreations.com/Modeles-de-mise-en-page-en-CSS