Resolve "TSS enrichment score"

Holly Ruess
2020-05-28T08:08:54-05:00

Please fill in the appropriate checklist below (delete whatever is not relevant).
These are the most common things requested on pull requests (PRs).

## PR checklist
- [ ] This comment contains a description of changes (with reason)
- [ ] If you've fixed a bug or added code that should be tested, add tests!
- [ ] Documentation in `docs` is updated
- [ ] `CHANGELOG.md` is updated
- [ ] `README.md` is updated
- [ ] `LICENSE.md` is updated with new contributors
Closes #30