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

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

node_modules/underscore/modules/before.js

@@ -0,0 +1,12 @@
+// Returns a function that will only be executed up to (but not including) the
+// Nth call.
+export default function before(times, func) {
+  var memo;
+  return function() {
+    if (--times > 0) {
+      memo = func.apply(this, arguments);
+    }
+    if (times <= 1) func = null;
+    return memo;
+  };
+}