Use shields.io for the fork badge & use objects for social badges (#1173)
Use shields.io for the fork badge & use objects for social badges (#1173)

- use objects for social badges (excl examples)
    - change from <a><img> -> <object>
- use shields.io for the github badge instead of ghbtns.com
- update twitter
freezy-sk/shields,badges/shields,badges/shields,freezy-sk/shields,badges/shields