Implement "real names" feature.

To enable this feature, the REAL_NAMES section needs to be added to the
enabled_sections variable in the config.yml file.

refs #4050
Implement "real names" feature (part 2)

refs #4050
Better add the migration, too.

refs #4050
Show Real Names heading for logged-in-but-name-not-shown case.

refs #4050
Tweaks based on review feedback.

refs #4050
Remove old file that was erroneously checked in.

refs #4050
Merge branch 'tapestry-master' into 4050-real-names
Merge branch '4050-real-names' into tapestry-master

closes #4050