rename some stuff and be more specific on some usages

src/com/gpl/rpg/atcontentstudio/model/gamedata/NPC.java

@@ -210,7 +210,10 @@ public class NPC extends JSONElement {
 
     @Override
     public void link() {
-        if (!this.linkCheck()) return;
+		if (shouldSkipParseOrLink()) {
+			return;
+		}
+		ensureParseIfNeeded();
         Project proj = getProject();
         if (proj == null) {
             Notification.addError("Error linking item " + id + ". No parent project found.");