Metawidget Ported to Angular 2

Metawidget development has slowed lately, thanks to two factors: the framework itself is very mature; and I've been consumed by my startup.

However, thanks to the Open Source community others have taken up the mantle. I look forward to integrating their work into the main branch in the future! For now, keep an eye on:

• React Port: https://github.com/SDS-React-Metawidget/react-metawidget
• React Example: https://github.com/SDS-React-Metawidget/react-mw-address-book
• Angular 2 Port: https://github.com/AmitsBizruntime/MetawidetA2

In addition, I'm still doing small changes and fixes as they come up.