sjn added some bioconductor ngs stuff

# GenomicRanges
RUN /usr/bin/Rscript --no-save --no-restore -e 'source("http://www.bioconductor.org/biocLite.R"); biocLite("GenomicRanges",dependencies=TRUE)'
# IRanges
RUN /usr/bin/Rscript --no-save --no-restore -e 'source("http://www.bioconductor.org/biocLite.R"); biocLite("IRanges",dependencies=TRUE)'
# Biostrings
RUN /usr/bin/Rscript --no-save --no-restore -e 'source("http://www.bioconductor.org/biocLite.R"); biocLite("Biostrings",dependencies=TRUE)'
# genomeIntervals
RUN /usr/bin/Rscript --no-save --no-restore -e 'source("http://www.bioconductor.org/biocLite.R"); biocLite("genomeIntervals",dependencies=TRUE)'
# rtracklayer
RUN /usr/bin/Rscript --no-save --no-restore -e 'source("http://www.bioconductor.org/biocLite.R"); biocLite("rtracklayer",dependencies=TRUE)'