Add node modules and new code for release (#57)

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

node_modules/underscore/cjs/before.js

@@ -0,0 +1,14 @@
+// Returns a function that will only be executed up to (but not including) the
+// Nth call.
+function before(times, func) {
+  var memo;
+  return function() {
+    if (--times > 0) {
+      memo = func.apply(this, arguments);
+    }
+    if (times <= 1) func = null;
+    return memo;
+  };
+}
+
+module.exports = before;