Issue #547: Add support for recording lab findings and chemicals detected.
The ChEBI ontology now has an API identical to the API of HPO.
Merge branch 'issue-547' of https://github.com/phenotips/phenotips into issue-547

Conflicts:
	components/ontology-access/chebi/api/src/main/java/org/phenotips/ontology/internal/solr/ChEBIOntology.java
	components/ontology-access/chebi/api/src/test/java/org/phenotips/ontology/internal/solr/ChEBIOntologyTest.java
Issue #547: Add support for recording lab findings and chemicals detected.
Optimal batching size is 3000 for ChEBI. Takes 15 min to index.
Fixed some issues with the SolrUpdateGenerator.