du: tweak output format
du: exit with status 1 on invalid arguments
Merge pull request #277 from ebfe/du

du: exit with status 1 on invalid arguments
du: make error output more consistent with other utils
Make the busybox test suite actually run
Merge pull request #279 from Arcterus/busybox-fix

Make the busybox test suite actually run with relative path names
Merge pull request #278 from Arcterus/du-error-msgs

du: make error output more consistent with other utils
echo: handle -- correctly
uutils: add fmt, sync
Merge pull request #281 from ebfe/uutils

uutils: add fmt, sync
sync: rename crate to uusync due to name clash with rusts libsync
fmt: make uumain public
Merge pull request #283 from ebfe/uutils

uutils: fix build
echo: fix handling of \0
echo: pass Busybox test suite
Merge pull request #280 from Arcterus/echo-fix

Make echo pass the Busybox test suite