Merge pull request #2 from benbalter/globals

Abstract site globals
update related posts to be styled better (requires markup changes)
Add 404 page template for GitHub Pages; generalize .lead
fixes #6: don't reset ul and ol padding
remove padding on left of colophon links
Use site.url in atom.xml instead of "http://markdotto.com"
Merge pull request #9 from parkr/patch-1

Use site.url in atom.xml instead of "http://markdotto.com"
adding syntax highlighting stylesheet from jekyll default theme
adding example of syntax highlighting in post
Replace semicolon with comma in meta viewport tag
Merge pull request #16 from thebinarypenguin/master

Replace semicolon with comma in meta viewport tag
Merge pull request #10 from swirlycheetah/master

Addition of syntax highlighting stylesheet from Jekyll default theme
improve example code and styles
heavier headings for contrast with body content
Fixes #13 and nullifies #14: Remove margin from parent .posts and instead only apply it to .post
Nuke extraneous use of box-sizing
Rewrite the CSS's headers and responsive code for a more streamlined and more scannable setup
Add theme support with eight starter themes based on base16
readme overhaul, including fix for #15
Remove dupe favicon