Fix/s3#5

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theclaymethod wants to merge 8 commits intoAlpineNow:masterfrom

theclaymethod:fix/s3

Commits on Dec 17, 2014

Fixing the problem where the label is expected to be a non-negative integer for regression.
Sung Chung
committed
Reducing the number of samples to get per column for equal frequency discretization.
Sung Chung
committed

Commits on Mar 24, 2015

Fix to HDFSForestStorage to allow for S3
theclaymethod
committed