Add GetDeviceKIDs to BareRootMetadata (#231)
Add GetDeviceKIDs to BareRootMetadata (#231)

This used to be GetCryptPublicKeys, which is
actually still used by server code.

Also fix object type for HasKeyForUser.
keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/kbfs