Markdown formatting
Fix typo in picturefill code
Exclude 404 page
Add latest PaperFaces portraits
Add half and third classes to display groups of images
Adjust CC text
Add new portraits
Add work in progress sketches
Add /articles redirect
Revert "Add /articles redirect"

This reverts commit 1a7e952ff769289942ebe382290d48e23d91b14c.
Document Kramdown table of contents implementation
Add portrait to filename
Remove deprecated settings
Lighten table of contents
Update for Jekyll 1.0.1
Remove extra space around button
Add note about YouTube video embed issue with Kramdown
Add speed painting video
Add Creative Commons meta
Add new PaperFaces portrait