need a license

[tgbugs]

We are planning to use this as part of our curation and validation pipelines for datasets in SPARC and I noticed that this repo does not have a license file and I could not find any indication of the license for reuse of the code elsewhere in the repo.

[mbkranz]

@pschumm Let me know if you'd like me to add a license here for reuse (or feel free to have someone at CTDS add one as well)