Updated findAll method to return a PageStructure array
Updated acceptance tests
Added verifications and error messages to Pages and Menus interfaces
Added Boostrap in assets.
Fixed a bug in Users edit interface (password not being hashed). Fixed a typo in Menus migration file.
Added "use" statements in all classes. Added IoC container usage
Added missing error messages in back-office views. Removed navigation from Editorial view
Merge branch develop -v0.2.2