Updated RebalanceDataset. Added Vec.makeZeros() call to make multiple zero vecs at the same time.
Merge branch 'master' of github.com:0xdata/h2o
Merge branch 'master' of github.com:0xdata/h2o
fixed AIOB in Vec.makezeros call.
Merge branch 'master' of github.com:0xdata/h2o
Merge branch 'master' of github.com:0xdata/h2o