Finish 1.1.4.1.
Update for schema.org version 1.6.
Update README list of vocabularies
Update README list of contributors

* disclosure: the diff is exactly the author of this commit
Merge pull request #162 from petervandenabeele/pv-fix-vocab-list/01

Update README list of vocabularies
Require 'openssl' in Util::File to ensure that HTTPS streams are properly parsed.
Make sure Vocabulary is generated in RDF namespace.
Update for schema.org 1.7 release, plus a minor update to FOAF.
Version 1.1.4.2.
Rekease 1.1.4.2.

* Update for schema.org 1.7 release, plus a minor update to FOAF.