tar archive reading/writing library - feature "default" and 1 more

 This library does not currently handle compression, but it is abstract over all
 I/O readers and writers. Additionally, great lengths are taken to ensure that
 the entire contents are never required to be entirely resident in memory all at
 once.
 .
 This metapackage enables feature "default" for the Rust tar crate, by pulling
 in any additional dependencies needed by that feature.
 .
 Additionally, this package also provides the "xattr" feature.