tree checksum vpatch file

all signers: diana_coman jfw

antecedents:

press order:

keksum_genesis_3diana_coman jfw

hunks:
COPYING
MANIFEST
Makefile
io.c
io.h
keccak.c
main.c
munge-testvecs.py
test-sponge.sh
testvectorsnonzero.txt
testvectorszero.txt