Normalize author names and uniform titles

[wlpotter]

See the list in #177 , in this comment. Will create a separate issue for creating a report of author and work names

[wlpotter]

Here is that list again, for reference:

• [x] Eusebius of Caesarea. Historia ecclesiastica -> Eusebius of Caesarea. Ecclesiastical History
• [x] Eusebius. Dictionary of Place Names -> Eusebius of Caesarea. Dictionary of Place Names
• [x] Eusebius. Life of Constantine -> Eusebius of Caesarea. Life of Constantine
• [x] Photius. Library Library -> Photius. Library
• [x] Pliny. Natural History -> Pliny the Elder. Natural History
• [x] Procopius of Gaza. Letters -> Procopius of Gaza. Letter
• [x] Socrates Scholasticus. Ecclesiastical History -> Socrates of Constantinople. Church History
• [x] Sozomenus. Church History -> Sozomen. Church History

[wlpotter]

These are all fixed