Add fileset-reduce macro
Add fileset-reduce macro

bbatsov/boot,instilled/boot,tobias/boot,instilled/boot,ragnard/boot,ragnard/boot,danielsz/boot,kausdev/boot,junjiemars/boot,junjiemars/boot,kennyjwilli/boot,crisptrutski/boot,boot-clj/boot,ragnard/boot,junjiemars/boot,tobias/boot,upgradingdave/boot,kausdev/boot,RadicalZephyr/boot,kausdev/boot,crisptrutski/boot,danielsz/boot,upgradingdave/boot,upgradingdave/boot,danielsz/boot,crisptrutski/boot,RadicalZephyr/boot,kennyjwilli/boot,tobias/boot