management.commands: Use new base class for command

Fixes #1

fountain/management/commands/ldap_sync.py

-from django.core.management.base import NoArgsCommand
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+from django.core.management.base import BaseCommand
 from fountain.ldap import Ldap
 from django.contrib.auth import get_user_model
 
-class Command(NoArgsCommand):
+class Command(BaseCommand):
     help = "Updates the attributes from all current Django users from a LDAP server." 
     
-    def handle_noargs(self, **options):
+    def handle(self, *args, **options):
         verbosity = options.get('verbosity')
         User = get_user_model()
         l = Ldap()
-                
+        
         values = list(l.LDAP_SYNC_USER_ATTRIBUTES.values())
         values.append(User.USERNAME_FIELD)
         for user_dict in User.objects.all().values(*values).iterator():