tree checksum vpatch file

all signers: asciilifeform bvt diana_coman

antecedents:

press order:

ffa_ch1_genesis.kvasciilifeform bvt diana_coman

hunks:
ffa/README
ffa/ffademo/README
ffa/ffademo/bin/README
ffa/ffademo/demo_ch1.adb
ffa/ffademo/demo_ch1.ads
ffa/ffademo/ffa_demo.adb
ffa/ffademo/ffa_demo.gpr
ffa/ffademo/ffa_io.adb
ffa/ffademo/ffa_io.ads
ffa/ffademo/obj/README
ffa/libffa/README
ffa/libffa/ffa.gpr
ffa/libffa/fz_arith.adb
ffa/libffa/fz_arith.ads
ffa/libffa/fz_type.ads
ffa/libffa/iron.ads
ffa/libffa/lib/README
ffa/libffa/obj/README
ffa/libffa/restrict.adc
ffa/libffa/w_shifts.ads
ffa/libffa/word_ops.adb
ffa/libffa/word_ops.ads
ffa/libffa/words.ads