additional tweaking
additional tweaking

using adduser to staff group to write in /usr/local/lib/R/site-library
install just r-base-dev (which implies all the R build needs and more)
install littler which may come in handy for scripting

robzhu/r-travis,hadley/r-travis,craigcitro/r-travis,eddelbuettel/r-travis,craigcitro/r-travis,eddelbuettel/r-travis,qinwf/r-travis,hadley/r-travis,robzhu/r-travis,qinwf/r-travis