add node modules to repo

node_modules/traverse/examples/negative.js

@@ -0,0 +1,8 @@
+var Traverse = require('traverse');
+var obj = [ 5, 6, -3, [ 7, 8, -2, 1 ], { f : 10, g : -13 } ];
+
+Traverse(obj).forEach(function (x) {
+    if (x < 0) this.update(x + 128);
+});
+
+console.dir(obj);