updated cli usage help output to clarify verbosity arg
updated cli usage help output to clarify verbosity arg

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