Metadata correction proposals

* *Perseus Resources* - some resources have empty /pubdate:/ field

* *Pirke Avot: Timeless Wisdom for Modern Life: Hebrew Text* needs Hebrew added to Language

* *Hippolytus of Rome. The Treatise on the Apostolic Tradition of St. Hippolytus of Rome, Bishop and Martyr: Greek. Edited by Gregory Dix.* - language is to be Greek, not English

* *Hippolytus of Rome. The Treatise on the Apostolic Tradition of St. Hippolytus of Rome, Bishop and Martyr* (Four resources) - while resource language now has been corrected where it was wrong, the books' titles and metadata don't refer any longer to editor Dom Gregory Dix (two do in the resource info, two don't at all). This is unfortunate, since the one 1937 book they were created from does refer to Dix as author - as does Logos' product page "Selected Works of Dom Gregory Dix". Title sort of (…)

* *Works of John Owen: Volume 17* - language should be "Latin; English" not just Latin; the sermons and discourses are in English