Update travis to work with and without R on girder-plugin version of Flow
Update travis to work with and without R on girder-plugin version of Flow

Kitware/flow,adsorensen/flow,adsorensen/flow,adsorensen/flow,Kitware/flow,Kitware/tangelohub,adsorensen/flow,Kitware/tangelohub,adsorensen/flow,Kitware/flow,Kitware/flow,Kitware/tangelohub