"Semantic" shim to provide "ReproNim"ification of outputs

[yarikoptic]

so we could e.g. feed results of mriqc etc into ReproPonds and ReproLakes. And idea which came up during monthly ReproNim meeting. Could be done as a part of our singularity_cmd shim execution but would need to be app/container specific and know where/how to parse command line (or react to differences detected with datalad status?)