Change c <- cbind(a,b) to have the colname of b show up in c.
Change the naming convention for duplicate col names to use underscore.
Merge branch 'master' of https://github.com/0xdata/h2o
Update demo code to recent change in cbind column naming.
PUB-1067: Fix the previous commit (bug fix v2).
Merge branch 'master' of https://github.com/0xdata/h2o