docker2singularity with singularity version 2.6

This release contains docker2singularity for singularity release 2.6.0-dist associated with tag v2.6 at https://hub.docker.com/r/singularityware/docker2singularity/tags/.

docker2singularity with Singularity 2.1.2

This release corresponds to the docker2singularity latest image, the last built for the Singularity 2.1.2 software.