Update settings

Signed-off-by: Michal Čihař <michal@cihar.com>
Update screenshots

Signed-off-by: Michal Čihař <michal@cihar.com>
Compress better images

Signed-off-by: Michal Čihař <michal@cihar.com>
Optimize thumbnails

Signed-off-by: Michal Čihař <michal@cihar.com>