Add social media buttons

[wbprice]

The user should be able to share the link to their results. Shared text should read something like:

I know which local candidates I'm voting for this year! Take the OKCandidate survey to find out for yourself! http://okcandidate.code4hr.org/

• Twitter
• Facebook

[wbprice]

Shared image should say "I got . What about you?" Photo of the mayor selected.