Mcl.sickbay

In this release:

- Base metadata for all classes now includes:
- `consortium`, a nullable string that can be used to contain an RDF URI to the consortium that originated the data, such as `https://mcl.nci.nih.gov/` for the Consortium for Molecular and Cellular Characterization of Screen-Detected Lesions.
- `protocolID`, a nullable integer that tells the research protocol that generated the data.
- Kristen's sample data (`--add-sample-data`) includes these consortium and protocol IDs

This release fixes:

- In `BreastOrgan`, the field `her2_in_situ_hybridization` was the wrong enumerated type. It should've been `HER2InSituHybridization`.
- In the enums, add the type `HER2InSituHybridization`.
- Add test data from `12_78_BreastCore_20200625_0`.
- Removed foreign key constraint from `Biospecimen.specimen_parent_ID` because the parent ID may be either another biospecimen or could be a participant (clinical core) object.
- New class `AdjacentSpecimen` to work around circular dependency problem of having adjacent specimens directly on `Biospeciment`.
- New JSON serialization for `adjacent_specimens` on `Biospecimen`
- Misspelled enumeration `AnatomicalSite`: `pancrease` → `pancreas`
- Change `create-demo-db` to `create-clinical-db` since this is no longer a demo but the real deal
- Transition from old style `setup.py` to everything in `setup.cfg`

In this release, 0.0.5, we also finally start keeping a changelog 😮