* library API:
- revamp API (make analogs for Unix fs access calls)
- add dircache list to tar handle
- support star format(s)?
- add support for POSIX.1-2001 pax format
- large file support?
- support reading from tape devices with different block sizes?
* libtar program:
- make the libtar program a much more fully-featured tar
- move output.c and wrapper.c from lib directory to libtar directory