tree checksum vpatch file

all signers: bvt asciilifeform diana_coman

antecedents: ffa_ch11_tuning_and_api.kv ffa_ch12_karatsuba_redux.kv

press order:

ffa_ch1_genesis.kvasciilifeform bvt diana_coman
ffa_ch2_logicals.kvasciilifeform bvt diana_coman
ffa_ch3_shifts.kvasciilifeform bvt diana_coman
ffa_ch4_ffacalc.kvasciilifeform bvt diana_coman
ffa_ch5_egypt.kvasciilifeform bvt diana_coman
ffa_ch6_simplest_rsa.kvasciilifeform bvt diana_coman
ffa_ch7_turbo_egyptians.kvasciilifeform bvt diana_coman
ffa_ch8_randomism.kvasciilifeform bvt diana_coman
ffa_ch9_exodus.kvasciilifeform bvt diana_coman
ffa_ch10_karatsuba.kvasciilifeform bvt diana_coman
ffa_ch11_tuning_and_api.kvasciilifeform bvt diana_coman
ffa_ch12_karatsuba_redux.kvasciilifeform diana_coman
ffa_w_borrow_expr.kvasciilifeform diana_coman

hunks:
ffa/MANIFEST.TXT
ffa/libffa/word_ops.adb