Fixed bug in user creation

counter/views.py

         nick = data['nick'][0]
         password1 = data['password1'][0]
         password2 = data['password2'][0]
-        email_notifications = (data['email_notifications'][0] == "on")
+        email_notifications = ('email_notifications' in data.keys())
 
         if password1 != password2:
             error = "Les deux mots de passe sont différents."