Error 500 avoided when asking list with no existing category
Better subcategory management
Merge branch 'master' of github.com:cym0n/strehler into production
Debug lines erased
Merge branch 'master' of github.com:cym0n/strehler into production
Category creation safe against parent inexistence
Merge branch 'master' of github.com:cym0n/strehler into production
Ad hoc categories for business lunch