Switch to simpler RSS generation via template

Includes content and does away with the big chunk of code.

snaptortoise's jekyll-rss-feeds

<https://github.com/snaptortoise/jekyll-rss-feeds/blob/6451c5c66408ad5b49f6f27e29db3f5a1b1f0e80/feed.xml>
Remove double-slash from path in XML
Add quine for blockquote tag
Add basic styling for blockquote blocks
Post: "Strong Feelings on Weak Outets"
Subtitle clarifies "IBOutlets"