weapon and unit implication

BUR #83 has been approved by @Eastman.

create implication teishin_shudan -> imperial_japanese_army
create implication type_100_late_(smg) -> type_100_(smg)
create implication type_100_early_(smg) -> type_100_(smg)

👀

The bulk update request #83 (forum #178) has been approved by @Eastman.