Throw error if closure compiler is not installed
Throw error if closure compiler is not installed

metasyn/rainbow,jeremykenedy/rainbow,greyhwndz/rainbow,jeremykenedy/rainbow,cybrox/rainbow,HotelsDotCom/rainbow,linuxl0ver/rainbow,HotelsDotCom/rainbow,ccampbell/rainbow,ccampbell/rainbow,HotelsDotCom/rainbow,javipepe/rainbow,metasyn/rainbow,ptigas/rainbow,cybrox/rainbow,linuxl0ver/rainbow,greyhwndz/rainbow,metasyn/rainbow,javipepe/rainbow,segmentio/rainbow,jeremykenedy/rainbow,greyhwndz/rainbow,segmentio/rainbow,javipepe/rainbow,cybrox/rainbow,linuxl0ver/rainbow,ptigas/rainbow