Round should avoid clearing s, save a string

Instead of saving bytes, save a string, which makes String() faster
and does not unduly penalize marshal. During parse, save the string
if it is in canonical form.

pkg/api/resource/deep_copy.go

@@ -0,0 +1,32 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package resource
+
+import (
+	inf "gopkg.in/inf.v0"
+
+	conversion "k8s.io/kubernetes/pkg/conversion"
+)
+
+func DeepCopy_resource_Quantity(in Quantity, out *Quantity, c *conversion.Cloner) error {
+	*out = in
+	if in.d.Dec != nil {
+		tmp := &inf.Dec{}
+		out.d.Dec = tmp.Set(in.d.Dec)
+	}
+	return nil
+}