Allow archive formats to be used in the middle of a compression chain

[marcospb19]

Currently, Ouch only supports archive formats at the start of the chain.

x.tar
x.tar.gz
x.zip
x.zip.bz.xz.sz

It is a weird use case, but Ouch should be able to handle archives in such formats with the archive at the middle or the end:

x.gz.tar.gz
x.gz.tar

For compressing, decompressing and listing.