hamburger menu demo for windows and windows phone 8.1, extended version of http://blogs.msdn.com/b/madenwal/archive/2015/03/25/how-to-create-a-hamburger-menu-control-for-windows-8-1-and-windows-phone.aspx
New features:
- Animation on hamburger button.
- Swipe to close.
- Click on back button close the menu.
