Added loading behavior.
Added loading behavior.

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