Working version without feature engineering, 0.094 LB
again
WIP for Interactions.
Merge branch 'master' into arno-features

Conflicts:
	R/examples/Kaggle/TradeShift.R
Merge branch 'master' into arno-features
Add mean imputation of training data, based on group-by on response.
H2O World banner on H2O page.
Merge branch 'master' of github.com:0xdata/h2o
Fix survfit logic when there are no numeric predictors.
tableau demo changed to use nthreads = -1 at startup and ddply in place of h2o.ddply
Merge branch 'master' into aboyoun-coxph
Fix PUB-1075: NaN imputation of categoricals depended on ASTOp "mode", which
erroneously returned -1 instead of Double.NaN, because it was looking for the
string "NA" in the domain, which typically doesn't happen (arguably, should
never happen).

This caused NaN imputation of categoricals with method = "mode" to fill in a
value of -1, which led to _domain[-1] type errors during algo runtime.
Merge branch 'master' of https://github.com/0xdata/h2o
Added offset to GLM2.
Returned null_Deviance into GLM2 model output.
Add example R script to compute MSE for classifiers.
Merge branch 'master' of https://github.com/0xdata/h2o
Fixed heading & links
Merge branch 'master' of https://github.com/0xdata/h2o
Fixed syntax for readability