Add in progress note

Update README for Xcode 11 / iOS 13

Add README to project

Update to use new AVCaptureDevice API

Change deployment target to iOS 13

Delete unused AppDelegate methods

Extract view

Rename CaptureSessionController to CameraFeed

Update image asset catalogue for Xcode 11

Use a launch storyboard

Update playground for Xcode 11

Update .travis.yml

Update for Xcode 11

Update to Swift 5

Disable Swift 3 @objc inference