Custom Adapter

Hello,

I love Your library, it looks awesome. I would like to dynamically set the icons of menuitems. Right now when I call:

MenuItem avatar = (MenuItem) mRibbonMenu.findViewById(R.id.ribbon_menu_avatar);
avatar.setTitle("hello world");

I get NullPointerException. 

It would be also nice to be able to set custom adapter for the menu so I can style it like  regular layout. Is that possible?
