Moving clinical_history into specimen
Specimen now has one clinical_history, clinical_history no longer knows
its patient
Gross and Stains can be added to specimen
Styling the specimen in the patient activity feed
Deleting some tests, patient no longer has clinical_history
Cleaning up factories, basic specimen specs
Merge pull request #21 from sebastiangeiger/feature/17-combine-clinical-history-into-specimen

Feature/17 combine clinical history into specimen