check unity back
check unity back
fix compiler error
first check of page
various fix of page
seems page is ok, try add col tmr
windows check
Merge branch 'unity'

Conflicts:
	R-package/src/Makevars
	R-package/src/Makevars.win
Merge branch 'master' into unity
add fmatrix, fight tmr
chgs
add fmatrix in, todo add buffer file
make rowbatch page flexible
add matrix builder
Merge remote-tracking branch 'origin/unity'

Conflicts:
	R-package/src/Makevars
	R-package/src/Makevars.win
	src/utils/io.h
	wrapper/xgboost.py
t push origin unityMerge branch 'master' into unity
finish the fmatrix
untested version of cpage
still buggy
pass trival test