add toy data
tab eliminated
changes to reg booster
pass simple test
add mushroom
add mushroom classification
finish mushroom
fix mushroom
change input data structure
modify tree so that training is standalone
modify tree so that training is standalone
add pathdump
add dump2json
start add coltree maker
chg license, README
Update README.md
Update README.md
add col maker
fix col maker, make it default
full omp support for regression