R support 2.14...
Tom locked master, and I would rather merge in the changes I made to R docs last night than not.

Merge branch 'master' of https://github.com/0xdata/h2o
Added  validation support to GLM2. Also fixed json output.
Merge branch 'master' of github.com:0xdata/h2o
summary & tail R units
Added a Classify-vs-Regression checkbox
Cleanup
Source arguments
Cleaned job invocation and args init
Added logStart() for GBM, so when the job launches the params are logged.
Fix cut and paste error in logging of ignored columns.
Back to default GBM unit tests
Merge branch 'master' of github.com:0xdata/h2o
Changes to examples in most R docs to reflect wrapper flow
Merge branch 'master' of https://github.com/0xdata/h2o

 want the stuff that's on master, like the current build, please.
Merge branch 'master' of github.com:0xdata/h2o
create/clear sandbox (like a normal cloud build would do)
Merge branch 'master' of https://github.com/0xdata/h2o
summary & tail r units
Changed some parameter names in GLM2 to match those in GLM1
Merge branch 'master' of github.com:0xdata/h2o