Plans to update workflow for revision

[satra]

• create dockerhub dockerfile and add to hub build
• test yarik's new dockerfile generator
• build image from dockerfile
• update generator to choose FSL version (5.0.7, 5.0.8, 5.0.9) and OS (just CentOS, Debian)
• create travis/circle matrix with versions
• create singularity version from docker
• implement setup script inside docker environment
• rerun workflows
• create comparison script