Merge pull request #565 from pwendell/dev-scripts. Closes #565.

SPARK-1066: Add developer scripts to repository.

These are some developer scripts I've been maintaining in a separate public repo. This patch adds them to the Spark repository so they can evolve here and are clearly accessible to all committers.

I may do some small additional clean-up in this PR, but wanted to put them here in case others want to review. There are a few types of scripts here:

1. A tool to merge pull requests.
2. A script for packaging releases.
3. A script for auditing release candidates.

Author: Patrick Wendell <pwendell@gmail.com>

== Merge branch commits ==

commit 5d5d331d01f6fd59c2eb830f652955119b012173
Author: Patrick Wendell <pwendell@gmail.com>
Date:   Sat Feb 8 22:11:47 2014 -0800

    SPARK-1066: Add developer scripts to repository.

1 files changed, 62 insertions, 0 deletions

diff --git a/dev/audit-release/sbt_app_streaming/src/main/scala/StreamingApp.scala b/dev/audit-release/sbt_app_streaming/src/main/scala/StreamingApp.scala
new file mode 100644
index 0000000000..3d0722d2ac
--- /dev/null
+++ b/dev/audit-release/sbt_app_streaming/src/main/scala/StreamingApp.scala
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 main.scala
+
+import scala.collection.mutable.{ListBuffer, Queue}
+
+import org.apache.spark.SparkConf
+import org.apache.spark.rdd.RDD
+import org.apache.spark.streaming.StreamingContext
+import org.apache.spark.streaming._
+
+object SparkStreamingExample {
+
+  def main(args: Array[String]) {
+    val conf = new SparkConf(true)
+      .setMaster("local[2]")
+      .setAppName("Streaming test")
+    val ssc = new StreamingContext(conf, Seconds(1))
+    val seen = ListBuffer[RDD[Int]]()
+
+    val rdd1 = ssc.sparkContext.makeRDD(1 to 100, 10)
+    val rdd2 = ssc.sparkContext.makeRDD(1 to 1000, 10)
+    val rdd3 = ssc.sparkContext.makeRDD(1 to 10000, 10)
+
+    val queue = Queue(rdd1, rdd2, rdd3)
+    val stream = ssc.queueStream(queue)
+
+    stream.foreachRDD(rdd => seen += rdd)
+    ssc.start()
+    Thread.sleep(5000)
+
+    def test(f: => Boolean, failureMsg: String) = {
+      if (!f) {
+        println(failureMsg)
+        System.exit(-1)
+      }
+    }
+
+    val rddCounts = seen.map(rdd => rdd.count()).filter(_ > 0)
+    test(rddCounts.length == 3, "Did not collect three RDD's from stream")
+    test(rddCounts.toSet == Set(100, 1000, 10000), "Did not find expected streams")
+
+    println("Test succeeded")
+
+    ssc.stop()
+  }
+}