switch to using Furthest initialization (was PlusPlus)
h2o default is now Furthest, anyhow (user has 3 choices, random (with a twist), PlusPlus, Furthest.
I like results I've seen with Furthest.
Merge branch 'master' of github.com:0xdata/h2o
Merge branch 'master' of github.com:0xdata/h2o
Merge branch 'master' of github.com:0xdata/h2o
make test cases smaller