Merge pull request twbs#11718 from KostyaTretyak/once

Added link to Ukrainian translation website (in about.html)

update remaining version numbers

3.0.1

remove dumb validation reports

remove accordion from customizer; shorten min height for affix

update links to point to download links

Merge pull request twbs#8637 from twitter/2.3.2-wip

Bump 2.3.2 dependencies and docs links for v3 RC1