Proposed reorg

[sminot]

I like the idea of using this repository to build and maintain Docker images that aren't provided nicely by biocontainers.

Looking over the current organization, I would suggest the following:

• Every active tool has a single Dockerfile under their folder.
• Additional Dockerfiles may be maintained in subfolders, but the one in the primary folder for the tool is the one which will be built in an automated way
• Automated Docker builds are configured to be triggered by tags following a regex. Example, the cutadapt tool will be built from any GH push with a tag matching tag:cutadapt.*
• That way any updates to an individual tool can be captured as a hosted Docker image by making a release with the appropriate tag, e.g. cutadapt-v1.0.0

[jgolob]

Sounds good.