Avoid cast to double.
Merge branch 'master' into arno-deeplearning2
SparsifyActivation specialization for dense/sparse.
Merge branch 'master' into arno-deeplearning2
Merge branch 'master' into arno-deeplearning2
Merge branch 'master' into arno-deeplearning2
Fix Dropout Test to use new Sparsify.
Add test of Iris dataset in DLProstateTest  TODO: add more datasets.
Merge branch 'master' of https://github.com/0xdata/h2o