set ENV for travis
set ENV for travis

adoosii/classroom,RyanTech/classroom,nfeliciano/classroom,tjhorner/classroom,ConnorCartwright/classroom,hackerkid/classroom,hackerkid/classroom,bhanuc/classroom,guoyu07/classroom,jasnow/classroom,mkcode/classroom,mostlybadfly/classroom,mostlybadfly/classroom,chengjunjian/classroom,ConnorCartwright/classroom,BelieveC/classroom,hackerkid/classroom,alejandrogarciasalas/classroom,adoosii/classroom,BelieveC/classroom,RyanTech/classroom,BelieveC/classroom,guoyu07/classroom,guoyu07/classroom,nfeliciano/classroom,ConnorCartwright/classroom,mkcode/classroom,BelieveC/classroom,mkcode/classroom,chengjunjian/classroom,alejandrogarciasalas/classroom,alejandrogarciasalas/classroom,nfeliciano/classroom,tjhorner/classroom,jasnow/classroom,adoosii/classroom,chengjunjian/classroom,mostlybadfly/classroom,bhanuc/classroom,bhanuc/classroom,tjhorner/classroom,jasnow/classroom,RyanTech/classroom