Enabled script to accept multiple system_definition inputs, to cope with the split build situation.

Tweak to avoid an abort if the system definition cannot be opened to obtain the package names. Fixed a hard-coded "PDK_2.0.0".

Script no longer used.

Removed attempts to identify new and relicensed packages, as this is already covered by another script and another part of the release notes.

Updated to parse options in a more standard way, added new options to allow a different path to the sources/sysdef in the earlier release, and to provide a usage message.

Alternative script for generating release note information about package changes and FCL usage. Uses the sources.csv and sysdef, so doesn't need to access the release archive to access previous package lists or names, and can work concurrently with other build analysis steps.