DEVELOPER-249 Prototype implementation of Share-this

Implements the share-this button using Socialite.js.
DEVELOPER-249 Created a new Slim partial

This is done to allow different pages to use different partials.
One set of pages requires the partial to be embedded in JavaScript
and templated at runtime. The other set is generated at site build
time.

Rewired event handlers to ensure that dynamically inserted
Socialte buttons will be displayed correctly on hover/click.

Removed the Socialite sprite since it is displayed only initially.
Corrected spelling
Fix for LinkedIn counter. Removed redunant styles.
DEVELOPER-350, update BRMS and BPM tag lines on forum page
Add video of Mark L