Please visit ggbio homepage for more tutorials and case studies.
To avoid confusing and conflicts for developers, we stopped development in github, and move our development to bioconductor svn repos.
You CAN still report issues here. And this github version control is generally used for wiki and gh-pages(homepage).
source("http://bioconductor.org/biocLite.R")
biocLite("ggbio")