skip key iff null
finally got around to porting this to fvec..cleaned up some old rf scoring hacks from va days.
Merge branch 'master' of github.com:0xdata/h2o
add option to disable score_pojo building in srf
gut treestats compute in SRF make
Sort columns in SpeeDRF in parallel - get ready to be Arno'd :)
Use RecursiveAction instead of H2OCountedCompleter (per Tomas' suggestion)
don't do 0x0 or begin with "