Better VectorGroup construction

Cleanup all the leaking keys & broken VectorGroup tests
Merge branch 'master' of github.com:0xdata/h2o
also retrieve normalized_coefficients for GLM
results -> result
Fix bugs in VectorGroup

VectorGroup key not properly made
Simplify atomic-update logic a bunch
Merge branch 'master' of github.com:0xdata/h2o
One more go on VectorGroups

Fix subtle counting problem and some fixed constant size bits
Renamed h2oWrapper to h2o and h2o to h2oRClient
Got rid of some extraneous files
Added manual for wrapper functions
Forgot to update Runit runner script