Style consistency

While I was at it.... fixing some style inconsistencies which probably creeped in over time.

Things like:
* comply with the 'wrap at 120 chars' style rule stated in the contributing.md document
* verify that all named links at the bottom of a post are in use, otherwise either remove or add link in post
* if the post uses named links, try and make sure all links in the post are in that style
* ensure logical order for the named links at the bottom
* consistent frontmatter spacing at top of posts
* use `()` when referencing functions