tests/test-copy

Add hg copy

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Add hg copy

extend dirstate to remember copies
add copy command
add copy repo operation
write copy metadata with commit

manifest hash: 9f42c7b4a2400d35807b5f18c05a31814fa3e375
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (GNU/Linux)

iD8DBQFCsMBTywK+sNU5EO8RAjXpAJ9fvNtTP1A/4veqFWQHcWGro7buyACgoVXz
/ngGOFowxS/zGkvUvGavYGQ=
=drb1
-----END PGP SIGNATURE-----

#!/bin/bash

set -x
hg init
echo a > a
hg add a
hg commit -t "1" -u test -d "0 0"
hg status
cp a b
hg copy a b
hg status
hg -d commit -t "2" -u test -d "0 0"
hg history
hg log a
hexdump -C .hg/data/b.d
hg cat b | md5sum
hg cat a | md5sum
hg verify