FIX ELASTIC_URL malformed when not defined in environment.
ADD test version of a future welcome page.
Refactor js code for forms validation.
ADD handle simple current case where new user is redirected
   (but now informed) to its pubs page.
FIX redirect to criteria the first time we connect.
    redirect to new pubs when saving criterias.
ADD redirect to new ads for user when user_code entered.
ADD send new id by mail on first visit.
ADD template for risno.json configuration file.
FIX typo welcome mail.
Merge branch 'master' into usability
ADD send id by mail as a reminder.
TODO check email validity BEFORE trying to send email.
FIX change users elasticsearch mapping so that mails
    are not analyzed and only exaxt matching are
    possible.
FIX typo