ARROW-406: [C++] Set explicit 64K HDFS buffer size, test large reads#226

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wesm wants to merge 2 commits intoapache:masterfrom wesm:ARROW-406

+62-7

Commits on Dec 5, 2016

Set explicit 64K HDFS buffer size, test large reads using buffered chunks
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Commits on Dec 6, 2016

cpplint
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