Add node modules and compiled JavaScript from main (#172)

Co-authored-by: Oliver King <oking3@uncc.edu>

node_modules/underscore/modules/chain.js

@@ -0,0 +1,8 @@
+import _ from './underscore.js';
+
+// Start chaining a wrapped Underscore object.
+export default function chain(obj) {
+  var instance = _(obj);
+  instance._chain = true;
+  return instance;
+}