v0.6.0

Change log:

• Updated code, data and examples to use CamelCase names for table columns:
  • all efo_* tables have as column names: Subject, Object
  • efo_labels table has additional columns:
    • IRI specifies the full term identifier
    • Direct specifies the number of traits in the metadata directly mapped to the term
    • Inherited specifies the number of traits indirectly mapped to the term (i.e., inherited from a direct mapping)
• Include Disease Ontology (DOID) terms in EFO as potential mapping targets
• Updated mappings with those obtained with text2term v2.3.0.