Add node modules and new code for release (#168)

Co-authored-by: OliverMKing <OliverMKing@users.noreply.github.com>

node_modules/underscore/cjs/uniqueId.js

@@ -0,0 +1,9 @@
+// Generate a unique integer id (unique within the entire client session).
+// Useful for temporary DOM ids.
+var idCounter = 0;
+function uniqueId(prefix) {
+  var id = ++idCounter + '';
+  return prefix ? prefix + id : id;
+}
+
+module.exports = uniqueId;