Upgrade to Jekyll 2

update to jekyll2, add coderay

Remove layout:nil from feed.xml
Merge pull request #1 from kollegorna/feat/jekyll2

Upgrade to Jekyll 2
Puma blog post

Add puma post

Update 2014-10-18-puma-is-cool.md

Update 2014-10-18-puma-is-cool.md

Add images to repo