Add bonus task

checker/checker.py

src/bonus/Makefile

src/bonus/README.md

src/bonus/checker

src/bonus/functional.asm

src/bonus/in/1.in

src/bonus/in/10.in

src/bonus/in/11.in

src/bonus/in/12.in

src/bonus/in/13.in

src/bonus/in/14.in

src/bonus/in/15.in

src/bonus/in/16.in

src/bonus/in/17.in

src/bonus/in/18.in

src/bonus/in/19.in

src/bonus/in/2.in

src/bonus/in/20.in

src/bonus/in/3.in

src/bonus/in/4.in