Install devtools from CRAN
install.packages('devtools')
Install dependent packages and latest Bioconductor (if you haven't already)
source('https://bioconductor.org/biocLite.R')
biocLite('GenomicRanges')
Install mskilab R dependencies (gUtils)
devtools::install_github('mskilab/gUtils')
Install chromunity
devtools::install_github('mskilab/chromunity')