Fall back to password entry if Touch ID is not available

Added fallback to password entry

Display the screenshot at nominal resolution

Restore info on testing with LAPolicyDeviceOwnerAuthentication

Better re-phrase the hardware testing note

Restore the security warning

Merge pull request #9 from Cee/sudo-83

Update prompt message

Update README

Update screenshot

Update prompt message

Update Readme

Remove debug logging

Use sudo-83 to build this project

Avoid renaming sudo