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

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

node_modules/underscore/modules/unzip.js

@@ -0,0 +1,15 @@
+import max from './max.js';
+import getLength from './_getLength.js';
+import pluck from './pluck.js';
+
+// Complement of zip. Unzip accepts an array of arrays and groups
+// each array's elements on shared indices.
+export default function unzip(array) {
+  var length = array && max(array, getLength).length || 0;
+  var result = Array(length);
+
+  for (var index = 0; index < length; index++) {
+    result[index] = pluck(array, index);
+  }
+  return result;
+}