Removed unused requires root test function and updated
tar requires function to use lookup method.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
This defines a new package for assembling rootfs with layers and
snapshots. We define some base types and operations that represent the
boiled down process of the unpacking a rootfs.
This code is untested but provides a base to work towards a full
implementation of rootfs unpacking.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
