Correct sign-in and waitlist links, and a useful phone view

NUU Flint

Correct sign-in and waitlist links, and a useful phone view

Changes

Fixed
Login and Sign in open NUU Account at account.nuucognition.com.
Fixed
Join Waitlist opens the waitlist of NUU Cognition at www.nuucognition.com/waitlist.
Changed
Guide in the header and the footer opens the Flint guide at guide.nuucognition.com/flint.
Added
On a phone, the page shows the install command and links to the guide, the waitlist, and the shard registry.
Added
The footer links to the changelog of this site, Suggest an idea, and Report a bug.
All updates of NUU Flint
Correct sign-in and waitlist links, and a useful phone view · NUU Flint