add singularity container v3.1

base/singularity:3.1

+ FROM centos:7.4.1708
+  MAINTAINER Kay Graf <kay.graf@km3net.de>
+ 
+  RUN yum install -y git subversion wget && yum clean -y all
+  RUN yum install -y ant bison flex-devel gcc gcc-c++ gcc-gfortran gdb make cmake glibc-static strace && yum clean -y all
+  RUN yum install -y doxygen && yum clean -y all
+
+  RUN yum groupinstall -y 'Development Tools' && yum install -y epel-release && yum install -y golang openssl-devel libuuid-devel libseccomp-devel squashfs-tools
+
+  RUN export GOPATH=${HOME}/go && export PATH=/usr/local/go/bin:${PATH}:${GOPATH}/bin
+  RUN mkdir -p ${GOPATH}/src/github.com/sylabs && cd ${GOPATH}/src/github.com/sylabs &&  git clone https://github.com/sylabs/singularity.git && cd singularity && git checkout v3.1.0-rc2
+  RUN cd ${GOPATH}/src/github.com/sylabs/singularity && ./mconfig && cd ./builddir && make && make install
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