Author: Kevin Atkinson <k@kevina.org>

Fix EnumerateChildren & hasChild to take a *cid.Cid instead of []*mdag.Link

Author: Jeromy Johnson <why@ipfs.io>

make FetchGraph use a cid

pin: fix TestPinRecursiveFail

License: MIT
Signed-off-by: Jeromy <why@ipfs.io>

License: MIT
Signed-off-by: Kevin Atkinson <k@kevina.org>