Merge pull request foundation#9763 from gerardkcohen/7548-reveal-scroll

7548 prevent reveal scroll on iOS using position:fixed on html element

Package up 6.3.1 release

Update for 6.3.1-rc1

Fix customizer setup for 6.3

Package up 6.3.0-rc3

Bump to rc2

Tweak package.json description

Package up 6.2-rc1

Package up v6.2.4

Package up rc2