Enhancement: Implement way to handle gzipped tar files in the tar extractor

[tempusfrangit]

Tar extraction cannot handle gzipped tar files. It should be possible to handle this however, it is somewhat diffcult as the content-type is application/gzip special casing might be needed for files of extension .tar.gz or .tgz to have a magic contentType returned.

This is not a huge priority but I've seen a few issues where the downloaded file is .tar.gz and the current .tar implementation does not handle it well.

[tempusfrangit]

Duplicate of #1