CSPACE-6152: Add persons_naturalhistory schema in App layer config. This schema, formerly services-only, had been inadvertently removed as a result of unified config work.
Merge pull request #89 from aronr/CSPACE-6152

CSPACE-6152: Add persons_naturalhistory schema in App layer config. This...
CSPACE-6159: App layer's Ant build target is not replacing all config files during a deployment to the Tomcat directory
CSPACE-6158: Don't crash on NPEs if section is missing; resolves case where authority item records with contacts sub-record have a spurious 'missing' section if they have extension schema.