Set contributor name as contributor image title

Fix code block markup in README

Remove stray angle bracket

Increase vertical body section padding

Tweak header, navigation padding

Specify logo width in header to reduce jumps on rendering

Link to homepage in navigation

Highlight current navigation item

Extract navigation items

Tweak homepage styling

Split homepage body into multiple sections

Allow custom body layout

Split of CSS class `.body-section` from `.site-body`

Remove bottom margin from last child

Remove organizer counter

Document starting of development server

Hide missing location details

Remove some text centering on homepage

Rename CSS class `{.block, table}.is-centered-h` to `{.block, table}.is-hcentered`

For consistency with `.row.is-hcentered`.

Extend link label