update some packages and remove node_modules from repo

app/node_modules/traverse/examples/stringify.js

@@ -1,38 +0,0 @@
-#!/usr/bin/env node
-var Traverse = require('traverse');
-
-var obj = [ 'five', 6, -3, [ 7, 8, -2, 1 ], { f : 10, g : -13 } ];
-
-var s = '';
-Traverse(obj).forEach(function to_s (node) {
-    if (Array.isArray(node)) {
-        this.before(function () { s += '[' });
-        this.post(function (child) {
-            if (!child.isLast) s += ',';
-        });
-        this.after(function () { s += ']' });
-    }
-    else if (typeof node == 'object') {
-        this.before(function () { s += '{' });
-        this.pre(function (x, key) {
-            to_s(key);
-            s += ':';
-        });
-        this.post(function (child) {
-            if (!child.isLast) s += ',';
-        });
-        this.after(function () { s += '}' });
-    }
-    else if (typeof node == 'string') {
-        s += '"' + node.toString().replace(/"/g, '\\"') + '"';
-    }
-    else if (typeof node == 'function') {
-        s += 'null';
-    }
-    else {
-        s += node.toString();
-    }
-});
-
-console.log('JSON.stringify: ' + JSON.stringify(obj));
-console.log('this stringify: ' + s);