PraveenSinghRao e8115cea45 Revert "Use async file handle for better parallelism (#1049)" (#1105)
This reverts commit b54c34742412af0001a69c2f7d909bc05e1ea71f.

Revert async file handle change as it causes failures with appveyor
2016-04-28 22:50:26 -07:00
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