tree checksum vpatch file

all signers: bvt asciilifeform diana_coman

antecedents: ffa_ch17_peh.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
ffa_ch13_measure_and_qshifts.kvasciilifeform diana_coman
ffa_ch14_barrett.kvasciilifeform diana_coman
ffa_ch15_gcd.kvasciilifeform diana_coman
ffa_ch16_miller_rabin.kvasciilifeform diana_coman
ffa_ch17_peh.kvasciilifeform diana_coman
ffa_ch18_subroutines.kvasciilifeform diana_coman

hunks:
ffa/MANIFEST.TXT
ffa/ffacalc/README
ffa/ffacalc/ffa_calc.adb
ffa/ffacalc/ffa_calc.ads
ffa/ffacalc/limits.ads
ffa/ffacalc/version.ads