Draft blog posts

[Thomas Broadley]

• Drafts appear under /posts/drafts, not under /posts
  • This introduces a lot of complexity when linking between posts with the same tag
• Drafts don't appear in the RSS feed, on the blog index page, or on tag index pages
• Other posts don't link to the draft if they have the same tag
  • But the draft links to them, and can link to other drafts under the same tag
• Tags shouldn't be listed on tag index if they only appear in draft posts
• Controlled by an isDraft flag in index.yml that defaults to false