- scoping
- devise messages in French
- localize devise emails
x admin layout
x logout button
x slugify page
x validation page slug
x update position when assigning a new parent
x remove all descendants
x slug from title
! update "path" when changing slug (new page too) ?
x mettre a jour le chemin dans _form si slug et/ou parent change
x slug for 404 and Index pages can not be modified
x store node closed or open in cookies
x snippets section
x menu items have to be translated
x layout needs at least content_for_layout
x parts js/css:
  x codemirror
  x change bg (separator)
  x when a tab is selected, if we change layout, we should move to the first visible one
x page parts
x layout part should be always in first
x pages section (CRUD)
- slug unique within a folder
- validates_uniqueness_of :slug, :scope => :id
- refactoring page.rb => create module pagetree
- my account section (part of settings)
- layouts section
- create 404 + index pages once a site is created
- can not delete index + 404 pages
- refactoring admin crud (pages + layouts + snippets)
- remove all pages, snippets, ...etc when destroying a website