TIDOC-901 Added notes on creating and updating menus.
Merge branch 'master' of git://github.com/appcelerator/titanium_mobile into tidoc-901
TIDOC-901 Added details on using menus for action items, and using menus with tab groups.
Updated example
Merge pull request #3900 from arthurevans/tidoc-901

TIDOC-901 Added details on using menus for action items