Think about installation via fastlane.ci

[KrauseFx]

Not an issue per se, but something I want to track here. With fastlane.ci we want to make it very easy to automatically manage Xcode installations, and of course we're gonna use xcode-install.

I wrote a summary of how the ideal workflow should look like for the user https://github.com/fastlane/ci/blob/master/docs/use_cases/update_xcode_installation.md

With xcode-install playing a more active role in fastlane.ci, I can imagine we're gonna spend some more time optimizing and working on xcode-install. In particular we want to find a way to somehow provide the admin credentials in an easy way, while still maintaining the user's trust 👍