title: I want to upgrade my app from sencha touch 2.1.1 to 2.2.1
body: <p>I use sencha touch 2.1.1 for my app. But now I want to upgrade my app to sencha touch 2.2.1
  I go through <a href="http://docs.sencha.com/touch/2.2.1/#!/guide/upgrade_1_to_2" rel="nofollow">http://docs.sencha.com/touch/2.2.1/#!/guide/upgrade_1_to_2</a> link but they did not get steps for how I can upgrade.
  So please any one know the proper steps for upgrading my app from sencha touch 2.1.1 to 2.2.1 the please help me.</p>