Doc Article Styles - v0.0.10

Heading/Paragraph adjustments

This update adjusts the font-size for h4 to scale nicer and look less like
an H3.

It also provides margins to direct div siblings of the article container,
to mimic the margins a <p> tag would have.

Lastly, the margins of <p> and direct <div> have been bumped up from
1em to 1.5em.