allow kubectl to be built statically

* Package kubectl in a container
* Add example with a pod using kubectl as a sidecar

examples/kubectl-container/Dockerfile

@@ -0,0 +1,18 @@
+# Copyright 2014 Google Inc. 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.
+
+FROM scratch
+MAINTAINER Daniel Smith <dbsmith@google.com>
+ADD kubectl kubectl
+ENTRYPOINT ["/kubectl"]