Download Quartz and PerformanceBezier from github

scripts/install.js

@@ -0,0 +1,20 @@
+var path = require('path');
+var ghdownload = require('github-download');
+
+function downloadSubModuleFromGithub(user, repo, callback) {
+  var dist = path.join(process.cwd(), 'ios/' + repo);
+
+  console.log('\r\n Start downloading ' + repo + ' to `' + dist + '`');
+  ghdownload({user: user, repo: repo, ref: 'master'}, dist)
+    .on('end', function() {
+      console.log('Download ' + repo + ' library success!');
+      callback && callback();
+    })
+    .on('error', function (err) {
+      console.error('Download ' + repo + ' library from github failed with err:', err);
+    });
+}
+
+downloadSubModuleFromGithub('adamwulf', 'PerformanceBezier', function () {
+  downloadSubModuleFromGithub('magicismight', 'QuartzBookPack');
+});