add CHANGELOG.md
add CHANGELOG.md

danp60/bullet,sideci-sample/sideci-sample-bullet,flyerhzm/bullet,sideci-sample/sideci-sample-bullet,danp60/bullet,dwb/bullet,sho-h/brakefast,flyerhzm/bullet,yakovenkodenis/bullet,dwb/bullet,eileencodes/bullet,rrosenblum/bullet,hannahbot/bullet,flyerhzm/bullet,sho-h/brakefast,rstacruz/bullet,jay3126/bullet,theass/bullet,theass/bullet,jay3126/bullet,hannahbot/bullet,rrosenblum/bullet,PikachuEXE/bullet,eileencodes/bullet,PikachuEXE/bullet,yakovenkodenis/bullet,rstacruz/bullet