Add a getter and setter for zipFileComment on the Archive

[LyricApps]

I need to get access for the comment of a Zip file I'm reading and also set set it when creating a new archive. I see there is already support for reading and writing the zipFileComment in CentralDirectoryStructure but there is no public access from the Archive. It would really great to add that !

Thanks for considering my request.

[byFinchley]

I'll add my vote to this feature. Reading and writing zip comments would be super useful for a project I'm working on.

[eduo]

Is this still opened? I've been wracking my brain trying to get ZIP file comments and CRC32 file checksums out of ZIP archives, with little luck.