RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} !^/(logout|upload/screenshots/html|projects) [NC]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

RewriteRule ^logout/([0-9a-zA_Z]+) /wp/wp-login.php?action=logout&redirect_to=/user/logoff&_wpnonce=$1 [L]
RewriteRule ^upload/screenshots/html/([a-z0-9\-]+)\.html /upload/screenshots/screenshot.php?image=$1 [L]

ErrorDocument 404 http://www.zfen.de/page-not-found/

User-agent: *
Disallow: /Demo/
Disallow: /Downloads/
Disallow: /_fb/