adding titles and summaries to social media share links

I added parameters into the links instead of using Open Graph tags (og tags) as discussed with Dak. OG tags give us more control over what displays when shared, especially in Twitter. But, this is still a big improvement over what we have now.
This code says that line 117 is a noop which does nothing, and line 118 will always execute once.  I think you want to indent line 118 with 2 spaces.