Guided Installation Support

This code allows Sparkle to download and install an installer package without launching Installer.app.

We use this ability in Power Manager (https://dssw.co.uk/powermanager/standard/) to allow updates to be deployed as complex installer packages but without burdening the user with stepping through the installer interface.

Instructions for enabling this ability in Sparkle are included in the file SUGuidedPackageInstaller.txt.

Please get in touch if you need clarifications or code changes -- graham.miln@miln.eu