rebase and fixup #688 from @to3i: elementwise max#1053
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jeffdonahue merged 2 commits intoBVLC:devfrom Sep 10, 2014
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I punted on generalizing the gradient checker's
kinkto be a non-unary function, and instead just reduced thestepsizeso that the probability of max element <= 2nd max element + stepsize is low (in fact it should technically be 0 since I also added the RNG seed).