add node modules to repo

app/node_modules/uuid/lib/md5.js

@@ -0,0 +1,25 @@
+'use strict';
+
+var crypto = require('crypto');
+
+function md5(bytes) {
+  if (typeof Buffer.from === 'function') {
+    // Modern Buffer API
+    if (Array.isArray(bytes)) {
+      bytes = Buffer.from(bytes);
+    } else if (typeof bytes === 'string') {
+      bytes = Buffer.from(bytes, 'utf8');
+    }
+  } else {
+    // Pre-v4 Buffer API
+    if (Array.isArray(bytes)) {
+      bytes = new Buffer(bytes);
+    } else if (typeof bytes === 'string') {
+      bytes = new Buffer(bytes, 'utf8');
+    }
+  }
+
+  return crypto.createHash('md5').update(bytes).digest();
+}
+
+module.exports = md5;