Add ability to print path to library init file

bin/fffun.in

@@ -30,6 +30,10 @@ while true; do
             includes=$includes:$2
             shift 2
             ;;
+        --library-init)
+            echo "__FFOOD_DIR__/ffood.sh"
+            exit 0
+            ;;
         --version)
             version_info
             exit 0