remove Archive::Tar and add recommends Archive::Zip

see lib/Module/Install/PAR.pm

kevin@billy:~/GitHub/Module-Install$ grep -r 'Archive::' .
./Makefile.PL:requires      'Archive::Tar'        => '1.44';
./lib/Module/Install/PAR.pm:    if ( eval { require Archive::Zip; 1 } ) {
./lib/Module/Install/PAR.pm:        my $zip = Archive::Zip->new;
./lib/Module/Install/PAR.pm:        return unless $zip->read($file) == Archive::Zip::AZ_OK()
./lib/Module/Install/PAR.pm:                  and $zip->extractTree('', 'blib/') == Archive::Zip::AZ_OK();
./lib/Module/Install/PAR.pm:Could not extract .par archive because neither Archive::Zip nor a
./lib/Module/Install/PAR.pm:Archive::Zip.
Merge pull request #8 from kevindawson/Archive-Zip

remove Archive::Tar and add recommends Archive::Zip