Introduce alertify contexts !
Merge branch 'master' of git://github.com/AppVentus/AvAlertifyBundle

# By MarcomTeam (7) and Leny BERNARD (2)
# Via Leny BERNARD
* 'master' of git://github.com/AppVentus/AvAlertifyBundle:
  Fix missing translation domain
  Translate confirm README
  traduction française
  missing data- on confirm-callback attribute
  Update confirm.html.twig
  Create alertify.pl.xliff
  Delete messages.pl.yml
  Create messages.pl.yml
  Update confirm.html.twig