Ajout classe css pour article et dimensionnement des articles pour faire
des blocs de 9 dans application.js
Merge branch 'frontend' of https://github.com/GeekStudentInside/NuitEMN into frontend

Conflicts:
	public/javascripts/frontend/application.js
Merge branch 'frontend' of https://github.com/GeekStudentInside/NuitEMN into frontend

Conflicts:
	public/javascripts/frontend/application.js
Merge branch 'frontend' of https://github.com/GeekStudentInside/NuitEMN into frontend
cleaning method in application.js
cleaning method in application.js