initial correction for vec tree
add cvgrad stats, simplify data
a fixed version
beta version, do a review
fix now today, try to think how to work tmr
:Merge branch 'unity'

Conflicts:
	src/gbm/gbtree-inl.hpp
	src/learner/evaluation-inl.hpp
	src/tree/param.h
Merge branch 'master' into unity
chg
Merge branch 'unity' of ssh://github.com/tqchen/xgboost into unity

Conflicts:
	src/learner/evaluation-inl.hpp
fix by giulio
Merge branch 'unity' of ssh://github.com/tqchen/xgboost into unity
change things back
Merge branch 'unity' of ssh://github.com/tqchen/xgboost into unity
add grow5 back, seems no changes
Merge pull request #45 from tqchen/master

better error handling
Merge pull request #46 from tqchen/master

merge master into unity
chg size_t to uint64_t unsigned long in wrapper
Merge branch 'master' into unity

Conflicts:
	src/learner/evaluation-inl.hpp
	wrapper/xgboost_R.cpp
	wrapper/xgboost_wrapper.cpp
	wrapper/xgboost_wrapper.h
make wrapper compile
rename findex->index