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

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

node_modules/underscore/cjs/_has.js

@@ -0,0 +1,8 @@
+var _setup = require('./_setup.js');
+
+// Internal function to check whether `key` is an own property name of `obj`.
+function has(obj, key) {
+  return obj != null && _setup.hasOwnProperty.call(obj, key);
+}
+
+module.exports = has;