do things
make it packable
speed test for R, and refinement of item list in doc
Merge branch 'master' of https://github.com/tqchen/xgboost
checkin makefile
Update README.md
Update README.md
add speedtest.R by -f
improve pack script
add vignette
Merge branch 'master' of https://github.com/tqchen/xgboost
refinement of document
refine vignette
Merge pull request #55 from tqchen/master

merge master into unity