remove sliver.name field from admin page. generate sliver.name for user when it isn't specified
diff --git a/plstackapi/core/models/sliver.py b/plstackapi/core/models/sliver.py
index 52420df..ef4e647 100644
--- a/plstackapi/core/models/sliver.py
+++ b/plstackapi/core/models/sliver.py
@@ -30,6 +30,8 @@
             raise exceptions.ValidationError, "Slice %s has no subnet" % self.slice.name
 
         self.os_manager.save_sliver(self)
+        if not self.name:
+            self.name = self.slice.name
         super(Sliver, self).save(*args, **kwds)
 
     def delete(self, *args, **kwds):