Rekease 1.1.4.2.

* Update for schema.org 1.7 release, plus a minor update to FOAF.
Add Vocabulary::Term#each_statement, #enum_for, and #to_enum.
Also, support :inverseOf, :domainIncludes and :rangeIncludes for schema.org-based annotation properties.
Use symbol versions of inverseOf/domainIncludes/rangeIncludes when loading a vocabulary.
Fully implement Vocabulary::Term#domain_includes/#range_includes
Tollerate bad IRI definitions in parsed voabularies when regenerating the RDF statements for each term.
Update for schema.org v1.8.
Version 1.1.4.3.
Release 1.1.4.3

* Updates for schema.org v1.8.