add links section in README
add links section in README

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