clean incorrect relu test code
relax benchmark milliseconds threshold
Merge pull request #1417 from Yangqing/dev

clean incorrect relu test code
fix relu cudnn test bug
Merge pull request #1432 from Yangqing/dev

fix relu cudnn test bug
fixed tanh to not return NaN for input values outside the range [-40, 40]
Fixed header order to satisfy linter
in SoftmaxLossLayer, check label >= 0 in addition to upper bound
use DCHECK in SoftmaxLossLayer so that bounds checking has no perf penalty without DEBUG
Merge pull request #1469 from longjon/label-lower-bound

Check both lower and upper bounds in SoftmaxLossLayer
Merge pull request #1455 from seanbell/tanh-fix

Fix tanh layer for badly scaled input values
Added extract_keys with labels tool