add updates blog post, with some accompanying css styles
update aside styling
Move selector to its own line
Minor tweats to initial Update content for Pure 0.2.0
Add info about improved developer workflow to 0.2.0 update post
Change font-size of h3s and h4s

I noticed that our main paragraph font-size is 18px, so I bumped up the
heading sizes so that h4s are as large (18px) as the paragraph text.