contact: Give disclaimer its own legend && do not use caution img
Use Arbutus Slab font for company name heading

* Fix slight padding offset (~2%) seen on mobile navigation links;
they are now 100%.

* Use nav-link:hover coloring (white).

* Push navigation links further down away from company heading.

* Increase top navigation padding slightly (larger highlighting).
Remove remote loading of err font
Trying out orange buttons
Introduce Markdown-based content loading for index && privacy pages