Speedup ADADELTA.
Cosmetics.
Ignore java.net.PlainSocketImpl.socketAccept(Native Method) in JProfile.
Add approxSumSquares, sampling 1/16th of the array length.
Code reorg, cleanup. Change max_w2 logic back to original, but use approxSumSquares.
Turn off max_w2 for MNIST example, no benefit.
Use inf instead of max_value for max_w2 for SpiralsTest.
Don't set unused parameters.
Speedup ADADELTA by combining both matrices into one.
Test DL spirals with sparse enabled (tests ADADELTA).
Disable use of approxSumSquares.
Cosmetics: make some variables and methods final.
Simplify ADADELTA logic.
Merge branch 'master' of https://github.com/0xdata/h2o