added help string for -i option
added help string for -i option

ecohealthalliance/tangelo,Kitware/tangelo,aashish24/tangelo,mathstuf/tangelo,Kitware/tangelo,ecohealthalliance/tangelo,mathstuf/tangelo,mathstuf/tangelo,aashish24/tangelo,Kitware/tangelo,aashish24/tangelo,ecohealthalliance/tangelo