MAPREDUCE-5899. Support incremental data copy in DistCp. Contributed by Jing Zhao.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596931 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10618. Remove SingleNodeSetup.apt.vm (Contributed by Akira Ajisaka)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596964 13f79535-47bb-0310-9956-ffa450edef68