Merged NATest into ParserTest2 and fixed couple of bugs revealed by this(now NATest is split into multiple chunks and there were  several bugs in data compression).
Merge branch 'master' of github.com:0xdata/h2o
small bug fix of enum parsing. fixed updating the chunk types array in reduce of AppendableVec.
Build classification or regression trees

Regression trees built on class-data (i.e. covtype) build about 10% but
require about 10% nodes and 20% more depth.
Merge branch 'master' of github.com:0xdata/h2o