Feature and fixes rollup release!

Lots of stuff from users!

New features:

• Changes to populate ZipArchive.ZipVolumne.Comment
• Tar symlink support
• Allow Flush on EntryStream
• file search support linq Pattern

Fixes:

• Tar filename with exactly 100 characters gets cut
• Recognise empty tar archives
• Enable parallel test execution
• Avoid throwing NotSupportedException in ReaderFactory hot path