Add node modules and compiled JavaScript from main (#54)

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

node_modules/underscore/modules/negate.js

@@ -0,0 +1,6 @@
+// Returns a negated version of the passed-in predicate.
+export default function negate(predicate) {
+  return function() {
+    return !predicate.apply(this, arguments);
+  };
+}