First release v1.0.0

Download the zip corresponding to the OS you want to run it on (Windows, Mac or Linux)

The tool can

• Take a given Apple Catalog URL, parse it and display the different build versions of macOS it could find in the catalog
• Download the required files for a chosen build version (also supports resuming interrupted downloads)
• Just display the download links for the required files in case you want to download the files yourself
• Rename InstallESDDmg.pkg to InstallESD.dmg and update InstallInfo.plist with that change