Add "Share this" widget to blog posts/pages

Adding this 'share this' widget allows readers to easily share articles/posts on Facebook, Twitter, and Google Plus. The 'share-this' widget type used here is a minimalist one, and is available at http://www.sharethis.com/. To set the publisher id, which is the id used to track/monitor activities on the website, edit the widget's script tag in the head tag as such:

stLight.options({publisher: "PUBLISHER_ID_HERE"})