enable non-copying sends in push

zero-copy of numpy arrays only applies to first-level in args/kwargs, but push took a dict as arg.  This simply changes push to pass the same ns as kwargs, so numpy arrays will be discovered.

IPython/parallel/client/view.py

@@ -656,7 +656,7 b' class DirectView(View):'
         # applier = self.apply_sync if block else self.apply_async
         if not isinstance(ns, dict):
             raise TypeError("Must be a dict, not %s"%type(ns))
-        return self._really_apply(util._push, (ns,), block=block, track=track, targets=targets)
+        return self._really_apply(util._push, kwargs=ns, block=block, track=track, targets=targets)
 
     def get(self, key_s):
         """get object(s) by `key_s` from remote namespace

IPython/parallel/util.py

@@ -351,7 +351,7 b' def interactive(f):'
     return f
 
 @interactive
-def _push(ns):
+def _push(**ns):
     """helper method for implementing `client.push` via `client.apply`"""
     globals().update(ns)