updated MassTable brief description
updated MassTable brief description

hodger/cyclus,rwcarlsen/cyclus,gidden/cyclus,gidden/cyclus,gidden/cyclus,rwcarlsen/cyclus,mbmcgarry/cyclus,Baaaaam/cyclus,mbmcgarry/cyclus,Baaaaam/cyclus,mbmcgarry/cyclus,gidden/cyclus,rwcarlsen/cyclus,hodger/cyclus,mbmcgarry/cyclus,hodger/cyclus,hodger/cyclus,rwcarlsen/cyclus,hodger/cyclus,Baaaaam/cyclus