tree checksum vpatch file

all signers: bvt asciilifeform diana_coman

antecedents: ffa_ch11_tuning_and_api.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

hunks:
ffa/HISTORY.TXT
ffa/MANIFEST.TXT
ffa/ffacalc/ffa_calc.adb
ffa/libffa/ffa.adb
ffa/libffa/ffa.ads
ffa/libffa/fz_arith.adb
ffa/libffa/fz_arith.ads
ffa/libffa/fz_modex.adb
ffa/libffa/fz_modex.ads
ffa/libffa/fz_mul.adb
ffa/libffa/fz_sqr.adb
ffa/libffa/fz_sqr.ads
ffa/libffa/w_mul.adb
ffa/libffa/w_mul.ads
ffa/libffa/words.ads