Add social media share plugin for the blog site

[viveksyngh]

Either find a Jekyll plugin that does it, or roll your own include. Both pretty straight forward. Be mindful of privacy if using a third party plugin, ie verify exactly what the code actually does yourself.

[alexellis]

Sounds good to me. @johnmccabe any thoughts?

[johnmccabe]

I've no objections, what solution is being proposed @viveksyngh