Merge branch 'v1.7-madeira-release' (William Casarin)

v1.7.1 (12) (William Casarin)

purple: mention privacy policy and eula (William Casarin)

preview: add purple backdrop to IAPProductStateView (William Casarin)

preview: use PurpleBackdrop in MarketingContentView preview (William Casarin)

refactor: introduce PurpleBackdrop (William Casarin)

Bump to 1.7.1 (William Casarin)

Update changelog (Daniel D’Aquino)

pushed to damus:refs/heads/master

http://git.jb55.com/damus/commit/9511ba767ac94a9adf7f6bd288d33d1172acf441.html