Use new ReBalanceDataSet helper in DeepLearning.
Merge branch 'master' into arno-deeplearning2
Use asyncExec for DeepLearningTask2 to avoid raising the thread priority.
Cosmetics.
Fix NPE in rebalance call.
Use -1 to indicate processing all the data per node.
Merge branch 'master' into arno-deeplearning2
Merge branch 'master' into arno-deeplearning2

Conflicts:
	src/main/java/hex/deeplearning/DeepLearning.java
Merge branch 'master' into arno-deeplearning2

Conflicts:
	src/test/java/water/fvec/RebalanceDataSet.java
Use new API for ReBalance.
Merge branch 'master' into arno-deeplearning2
Merge branch 'master' into arno-deeplearning2
Add sparse matrices and vectors.
Merge branch 'master' into arno-deeplearning2
Experimental Scopes for tracking Key lifetimes

Experimental 1-entry cache for Vec->Chunk lookups.
undo dead node hacks, change a timeout in Jobs, use an alternate column specification method in quantile test
Merge branch 'master' of github.com:0xdata/h2o
forgot this
Add DeepLearning MNIST example that should lead to better than 1.5% validation error.
Merge branch 'master' of https://github.com/0xdata/h2o