improve demo/mnist dataProvider speed#713

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reyoung merged 2 commits intoPaddlePaddle:developfrom

wangyang59:improveMnistDemo

Dec 16, 2016

Commits on Dec 14, 2016

improve demo/mnist dataProvider speed
wangyang59
committed

Commits on Dec 15, 2016

after clang-format
wangyang59
committed