Changed paths from absolute to relative

Signed-off-by: Claudio Rimann <contact@claudiorimann.ch>
Fix: Horizontal scroll-bars are gone

Signed-off-by: Claudio Rimann <contact@claudiorimann.ch>
Added Logo as SVG (fallback to PNG)

Signed-off-by: Claudio Rimann <contact@claudiorimann.ch>