[Bug-tar] better examples

[jidanni]

EXAMPLES
       tar -xvvf foo.tar
              extract foo.tar
Say extract all the files in foo.tar
       tar -xvvzf foo.tar.gz
              extract gzipped foo.tar.gz
Say extract all the files in gzipped foo.tar
       tar -cvvf foo.tar foo/
              tar contents of folder foo in foo.tar
Say archive the contents of folder foo into foo.tar



       -T, --files-from F
              get names to extract or archive from file F

Add Example: Browse one file from an archive:
$ echo wwwoffle-2.9d/doc/wwwoffle.man|tar -xf wwwoffle_2.9d.orig.tar.gz -T - 
-O|less