Add hack/cherry_pick_list.sh to list all automated cherry picks

* Adds hack/cherry_pick_list.sh to list all automated cherry picks
since the last tag.

* Adds a short python script to extract title/author and print it in
markdown style like our current release notes.

* Revises patch release instructions to use said script.

hack/lookup_pull.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+# Copyright 2015 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.
+
+# Script to print out PR info in release note format.
+
+import json
+import sys
+import urllib2
+
+PULLQUERY=("https://api.github.com/repos/"
+           "GoogleCloudPlatform/kubernetes/pulls/{pull}")
+LOGIN="login"
+TITLE="title"
+USER="user"
+
+def print_pulls(pulls):
+  for pull in pulls:
+    d = json.loads(urllib2.urlopen(PULLQUERY.format(pull=pull)).read())
+    print "* {title} #{pull} ({author})".format(
+        title=d[TITLE], pull=pull, author=d[USER][LOGIN])
+
+if __name__ == "__main__":
+  if len(sys.argv) < 2:
+    print ("Usage: {cmd} <pulls>...: Prints out short " +
+           "markdown description for PRs appropriate for release notes.")
+    sys.exit(1)
+  print_pulls(sys.argv[1:])