Changes since 7.x-1.0-rc2:
- Added an action to update a user's real name.
- Clear the user entity controller cache when a real name is deleted.
- Added validation for realname_settings_form() to prevent the [user:name] token from being used.
- Fixed HTML tag stripping must run decode_entities() first, and replace multiple spaces with one space (if tokens had no values and were removed).