Add classes from external ontologies

There is a new workflow to add classes from external ontologies (i.e., GO or CHEBI) that is much more streamlined as compared to MIREOTing.

1. Select 'owl:Thing'
2. Add a new class
3. paste the full iri in the 'Name:' field, for example, http://purl.obolibrary.org/obo/CHEBI_50906.
4. hit 'OK'

Now you can use this term for example to construct EQ definitions. The next time the imports are refreshed (which happens, the latest, when @drseb prepares a new release each month, but usually more frequently, and on request to the HPO mailing list), the metadata (labels, definitions, etc) for this term is imported from the respective external source ontology and becomes visible in hp-edit and hp-full.

If you want to refresh the import yourself (this may be necessary to pass the travis tests), and you have the ODK installed, you can run the following command (using go as an example):

cd src/ontology
sh run.sh make PAT=false imports/go_import.owl