MAPREDUCE-5765. Update hadoop-pipes examples README (Mit Desai via jeagles)

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svn merge -c 1577202 FIXES: MAPREDUCE-5789. Average Reduce time is incorrect on Job Overview page. Contributed by Rushabh S Shah


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HADOOP-10332. HttpServer's jetty audit log always logs 200 OK (jeagles)

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MAPREDUCE-5713. InputFormat and JobConf JavaDoc Fixes (Chen He via jeagles)

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HDFS-5244. Merge 1577254 from trunk:

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MAPREDUCE-5794. Merging r1577281 from trunk to branch-2.

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MAPREDUCE-5456. TestFetcher.testCopyFromHostExtraBytes is missing (Jason Lowe via jeagles)

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HDFS-6080. Merging change r1577319 from trunk

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