Some DRF2 work, pull a too-strong assert

Assert in H2O.putIfMatch seems too strong, pulled.
integrate w/master on DRF
copy jars to all machines (from s3) for easy h2o on hadoop on the various clusters
storeview only gives default view of 20 at a time, so repeat while deleting
Merge branch 'master' of github.com:0xdata/h2o