Add Just Enough Boxcars

https://www.nexusmods.com/railroader/mods/507

Replacing 100 T boxcars

Quincy.EBoxcarPack/LegosLibraryOfStuff/example-clone.json

@@ -0,0 +1,12 @@
+{
+    "identifier": "put thing here",
+    "newIdentifier": "put thing here",
+    "name": "put thing here",
+    "description": "put thing here",
+    "clone": true,
+    "cloneDefault": true,
+    "bulkAdds": [
+    ],
+    "removes": [
+    ]
+}