For people with Cyrillic characters

Added slugify to the final username that gets created.
Many times it has happened that when users comes from Facebook or Linkedin and don't have a username set on the social service their username is compiled from First name + Last name (AndersAnderssön) with slugify you now simply get andersandersson, when trying to make clean URL's like /profiles/<username> you end up getting a 500 error request.