Move page #post helper to encapsulate image references

Ref #143
- Fixes header images for static pages
Merge pull request #147 from novaugust/page-fix

Move page #post helper to encapsulate image references
Version bump to 1.1.2
Initial change to dark-background with light-foreground colors

A few minor changes to font size and article width for improved readability.
Change fonts for increased readability
Adjust font sizes for better reading on mobile devices