Add license to gemspec. Fix #363
Add license to gemspec. Fix #363

bangwu/whenever,thehungrycoder/whenever,rafaelsales/whenever,mindvalley/whenever,erikdahlstrand/whenever,HonoreDB/whenever,attilahorvath/whenever,Insomniware/whenever,makandra/whenever,stpn/whenever,betesh/whenever,lzheng571/whenever,medictrust/whenever,shtzr840329/whenever,Nguyenanh/whenever,Dearest/whenever,ctokoro/whenever,sideci-sample/sideci-sample-whenever,bernabas/whenever,javan/whenever