Move to Jekyll

[peterdesmet]

• [x] Copy settings
• [x] Keep permalinks
• [x] Move posts
• [x] Move pages
• [x] Move assets
• [x] Link to assets
• [x] Check internal links
• [x] Check charts
• [x] Add background images
• [x] Re-enable disqus: enabled in petridish, can only test on real site
• [x] Remove old posts from disqus (still there, no longer showed on site)
• [x] See if feed can remain at feeds/rss.xml rather than feed.xml *won't fix**