The package builds on StefansExpressionLib - please install that first.
source("https://bioconductor.org/biocLite.R")
biocLite(c("DESeq", 'Rsubread') )
library(devtools)
install_github('stela2502/RFclust.SGE')
install_github('stela2502/StefansExpressionSet')
install_github('stela2502/NGSexpressionSet')
or
install_github('stela2502/NGSexpressionSet', build_vignettes=FALSE)