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, 41 insertions, 0 deletions

diff --git a/dev/audit-release/maven_app_core/src/main/java/SimpleApp.java b/dev/audit-release/maven_app_core/src/main/java/SimpleApp.java
new file mode 100644
index 0000000000..6b65dda39b
--- /dev/null
+++ b/dev/audit-release/maven_app_core/src/main/java/SimpleApp.java
@@ -0,0 +1,41 @@
+/*
+ * 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.
+ */
+
+import org.apache.spark.api.java.*;
+import org.apache.spark.api.java.function.Function;
+
+public class SimpleApp {
+  public static void main(String[] args) {
+    String logFile = "input.txt";
+    JavaSparkContext sc = new JavaSparkContext("local", "Simple App");
+    JavaRDD<String> logData = sc.textFile(logFile).cache();
+
+    long numAs = logData.filter(new Function<String, Boolean>() {
+      public Boolean call(String s) { return s.contains("a"); }
+    }).count();
+
+    long numBs = logData.filter(new Function<String, Boolean>() {
+      public Boolean call(String s) { return s.contains("b"); }
+    }).count();
+
+   if (numAs != 2 || numBs != 2) {
+     System.out.println("Failed to parse log files with Spark");
+     System.exit(-1);
+   }
+   System.out.println("Test succeeded");
+  }
+}