Switch markdown engine.
Fix root directory.
Fix paths.
Add feed url.
Collapse sidebar by default.
Show asides only on index by default.
Customize twitter and pinboard asides.
Fix twitter aside always showing the follow link.

Even when `site.twitter_follow_button` is set to `false`, it would
show the text version of the follow link. This fix only shows the
text version when `site.twitter_follow_button` is set to `text`.
Enable disqus.
Enable google analytics.
Change `blog` to `home` in navigation.
Customize about me aside.
Customize styles.
Fix path to `public_dir`.