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

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

node_modules/underscore/cjs/restArguments.js

@@ -0,0 +1,29 @@
+// Some functions take a variable number of arguments, or a few expected
+// arguments at the beginning and then a variable number of values to operate
+// on. This helper accumulates all remaining arguments past the function’s
+// argument length (or an explicit `startIndex`), into an array that becomes
+// the last argument. Similar to ES6’s "rest parameter".
+function restArguments(func, startIndex) {
+  startIndex = startIndex == null ? func.length - 1 : +startIndex;
+  return function() {
+    var length = Math.max(arguments.length - startIndex, 0),
+        rest = Array(length),
+        index = 0;
+    for (; index < length; index++) {
+      rest[index] = arguments[index + startIndex];
+    }
+    switch (startIndex) {
+      case 0: return func.call(this, rest);
+      case 1: return func.call(this, arguments[0], rest);
+      case 2: return func.call(this, arguments[0], arguments[1], rest);
+    }
+    var args = Array(startIndex + 1);
+    for (index = 0; index < startIndex; index++) {
+      args[index] = arguments[index];
+    }
+    args[startIndex] = rest;
+    return func.apply(this, args);
+  };
+}
+
+module.exports = restArguments;