hide src/* files not necessary for users

src/.docker_modules/htseq/0.11.2/Dockerfile

src/.docker_modules/htseq/0.11.2/docker_init.sh

src/.docker_modules/htseq/0.8.0/Dockerfile

src/.docker_modules/htseq/0.8.0/docker_init.sh

src/.docker_modules/kallisto/0.43.1/Dockerfile

src/.docker_modules/kallisto/0.43.1/docker_init.sh

src/.docker_modules/kallisto/0.44.0/Dockerfile

src/.docker_modules/kallisto/0.44.0/docker_init.sh

src/.docker_modules/macs2/2.1.2/Dockerfile

src/.docker_modules/macs2/2.1.2/docker_init.sh

src/.docker_modules/multiqc/1.0/Dockerfile

src/.docker_modules/multiqc/1.0/docker_init.sh

src/.docker_modules/multiqc/1.7/Dockerfile

src/.docker_modules/multiqc/1.7/docker_init.sh

src/.docker_modules/music/6613c53/Dockerfile

src/.docker_modules/music/6613c53/docker_init.sh

src/.docker_modules/picard/2.18.11/Dockerfile

src/.docker_modules/picard/2.18.11/PicardCommandLine

src/.docker_modules/picard/2.18.11/docker_init.sh

src/.docker_modules/pigz/2.4/Dockerfile