Footprints actions by model

[jaumard]

Actually footprints can be configure only with true/false per actions.
It can be nice to have :

actions: {
      create: true,
      find: ['User', 'Role'],
      update: ['User'],
      destroy: true,

      /**
       * Specify which "association" endpoints to activate.
       */
      createAssociation: false,
      findAssociation: ['User'],
      updateAssociation: true,
      destroyAssociation: true
    }