Move nut-score into website/sandbox

Also move some .gitignore entries from the top-level .gitignore into a
subdirectory .gitignore.

website/sandbox/nut-score/UNUSED_webpack.config.js

@@ -0,0 +1,14 @@
+const path = require('path');
+
+module.exports = {
+  entry: './src/Index.bs.js',
+  // If you ever want to use webpack during development, change 'production'
+  // to 'development' as per webpack documentation. Again, you don't have to
+  // use webpack or any other bundler during development! Recheck README if
+  // you didn't know this
+  mode: 'production',
+  output: {
+    path: path.join(__dirname, "bundleOutput"),
+    filename: 'index.js',
+  },
+};