Squashed 'app/' changes from 38beeae..f3ed173

f3ed173 Button rounding
3bf7be7 More README

git-subtree-dir: app
git-subtree-split: f3ed1734ad2f3d8b407c423874c3c73194c06feb
Merge commit '31b358d776e8742f317689da89edcff81094c1a1'