upgrade 1.5.2 gemspec
upgrade 1.5.2 gemspec

dwb/bullet,rrosenblum/bullet,yakovenkodenis/bullet,danp60/bullet,jay3126/bullet,theass/bullet,flyerhzm/bullet,PikachuEXE/bullet,eileencodes/bullet,PikachuEXE/bullet,eileencodes/bullet,danp60/bullet,rstacruz/bullet,rstacruz/bullet,jay3126/bullet,sho-h/brakefast,hannahbot/bullet,hannahbot/bullet,rrosenblum/bullet,sideci-sample/sideci-sample-bullet,sho-h/brakefast,yakovenkodenis/bullet,dwb/bullet,flyerhzm/bullet,flyerhzm/bullet,theass/bullet,sideci-sample/sideci-sample-bullet,0xCCD/bullet