move the random fp string formatting to shared library
Improve comments for Neurons.
Add comments and general code cleanup.
tuned
Somehow -beta got whacked again.  Put it back.
Merge branch 'master' of https://github.com/0xdata/h2o
Add more comments.
make the approxQuantiles* method go thru the exactQuantiles* method, with a special interpolation_type=-1 to cause a single pass best guess. This eliminates the replicated code that was in approxQuantiles and makes approxQuantiles better for the corner cases where you can actually get an exact answer. (shouldn't affect anything since R doesn't use the approx, and browser default is exact). although some code tweaks in exactQuantiles to make it work.
various summary2/quantile/test.0xdata.com tweaks. focused the xorsum tests to generate numbers away from the known bugs, to see if there were issues in other number ranges
Merge branch 'master' of https://github.com/0xdata/h2o
Hadoop doc to include Hortonworks
minor tweaks
DRF - better one-node vs many-node heuristic.

Help text explicitly mentions only running on one node, in exchange for
less network overhead.

Default heuristic now also checks count-of-chunks vs cluster-size, so a
generously-heap-provisioned cluster will still run distributed if there
are enough chunks to go around.

Fix printout of Inspect2 "mean" for e.g. boolean columns.
added quick example for blog post
Merge branch 'master' of https://github.com/0xdata/h2o
Fix ClassDist bug for the case where there are no chunks on some nodes (always initialize reduction array to 0s).
Merge branch 'master' of https://github.com/0xdata/h2o
Fix for PUB-504. Return correctly oriented confusion matrix.
Fix for PUB-501. Catch illegal argument exception and display error message in R.
Fix for PUB-116. Throw an error if user-specified key in R is illegal. First character must be an alphabetic letter or underscore. Other characters must be alphanumeric or underscore.