This changeset fixes tar behavior on creating archive, like:
tar cf foo.tar .
which include also archive file itself, so that tar reports an error
`file changed as we read it` during appending archive file to itself.
This changest is fixing that by replacing dot with list of items to be
added to the archive (similar as in RarArchive.create).
To give user a possibility to choose what archiver he can use another
options was introduced for cd32 and archive wrapper modules. This option
will indicate what archiver should be used for compressing the save
state directories.
