add things here

• centre the recent posts list on home page (and archive)
• fix internal nav styling for consistency (sans-serif?)
• pick another sans-serif?
• fix homepage and page header/nav media query breakpoints
• review: use of position: relative for header displacement?
• consider moving footer out of bootstrap in html
• style return to top link esp. for $screen-xs-max
• fix versal, esp. for $screen-xs-max
• improve date styling
• improve archive list styling/recent-post styling
• improve homepage contact link hover styling
• improve about page?
• use Petica for footer content text?
• start paying this site more attention again