Server render auto-index pages

Also, load the autoIndex bundle on the client so we can use React
instead of using an inline script.

server/client/.babelrc

@@ -0,0 +1,8 @@
+{
+  "presets": ["env", "stage-2", "react"],
+  "env": {
+    "production": {
+      "plugins": ["transform-react-remove-prop-types"]
+    }
+  }
+}