AP Style Updates

A couple of AP style updates:

• After much angst in some quarters, AP has finally come away from "retarded" as the term for those "with significantly subaverage intellectual functioning." The term to use is now mentally disabled. Update the existing entry.
• There's also a new entry, a sign of our times: noncombat/noncombatant. The one-word construction is consistent with AP's general entry on "non."