Added build status badge to the README
Added build status badge to the README

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