Dealed with ',' in the web code title
Switched from opha.se/w/ to go.opha.se/
Killed Christian Neukirchen and Maryanne Nguyen (from impressum)
Short links are now prefixed with http:// (only the clickable link, not the text)
Added 'Kleine Leseanleitung' to 'vorwort'
Removed Maryanne Nguyen's cool picture
Moved 'vorwort' to frontmatter