Add Framework7 implementation

[scottlawton]

http://www.idangero.us/framework7/ supports both iOS 7+ look and Android Material Design.

There are several demo apps http://www.idangero.us/framework7/apps/

And a showcase of apps from one or both app stores: http://www.idangero.us/framework7/showcase/ (full disclosure: including mine, Aplt1)