bgruening/docker-galaxy-stable: Galaxy Docker Image 17.09

much improved documentation about using Galaxy Docker and an external cluster (@rhpvorderman) CVMFS support - mounting in 4TB of pre-build reference data (@chambm) Singularity support and tests (compose only) more work on K8s support and testing (@jmchilton) using .env files to configure the compose setup for SLURM, Condor, K8s, SLURM-Singularity, Condor-Docke