BEDtools: add singularity files

src/singularity_modules/BEDtools/2.25.0/BEDtools.def

+Bootstrap: docker
+From: ubuntu:16.04
+
+%labels
+MAINTAINER Laurent Modolo
+
+%post
+BEDTOOLS_VERSION=2.25.0
+PACKAGES=bedtools=${BEDTOOLS_VERSION}*
+
+apt-get update && \
+apt-get install -y --no-install-recommends ${PACKAGES} && \
+apt-get clean
+
+%environment
+export BEDTOOLS_VERSION=2.25.0
+
+%runscript
+exec /bin/bash "$@"

src/singularity_modules/BEDtools/2.25.0/build.sh

+#/bin/sh
+sudo singularity build --force /bin/bedtools:2.25.0.sif src/singularity_modules/BEDtools/2.25.0/BEDtools.def