Create sandbox branch and a first controller
Tuto: Posts management without routes configuration
Tuto: Login and logout. Page access rules
Tuto: User access rules. To be improved
Revert "Tuto: User access rules. To be improved"

This reverts commit ae65ba346104c24a1de6fadd06d54a03db71eaa1.
Tuto: User access rules.Only admin can do everything. A post is settable by its owner
Dev: User add validation. To be improved