recalculating only the new hanchans shoud do the trick now.

the racalc cronjob reports erronous partly recalculations now.
A lot of code cleanups

src/maistar_ranking/models.py

@@ -63,6 +63,11 @@ class Game(models.Model):
 
     objects = managers.GameManager()
 
+    class Meta(object):
+        """Display rankings by placement, best players first."""
+        ordering = ('-event__start', '-id')
+
+
     def __str__(self):
         return _("Mai-Star Game with {0} from {1:%Y-%m-%d}").format(
             self.player_names, self.event.start