#2704: Add better alt text to people photos. Add distinct title text to website links.
#2765: Better alts for news and biblio images.
Merge branch 'SCHOLAR-3.x' into 2704-people_accessibility
Merge branch 'SCHOLAR-3.x' into 2704-people_accessibility
#2765: Only set alts if there's actually an image in the field.
#2765: Prevent notices when saving a person node that has empty fields.
Merge pull request #2762 from openscholar/2704-people_accessibility

Accessibility for people photos and website links