Update dependencies
Add link tooltips
Allow mouse side button navigation
Cross-protocol links
Try handling encoding better
Handle more errors better
Fix broken header handling

Fixes header not splitting properly. This issue caused some pages (e.g
the client torture test) to load halfway through.
Update dependencies
Add tabs into planned feature
Add TLS cerificate verification into known bugs
Add development notice
Update documentation
List features on README
Use fixed content width instead of dynamic margins
Allow forward navigation
Enable navigation
Cache the content surface
Add loading statusbar
Clipping and plaintext support