capacity constraint constructor now throws a useful error message rather than using an assert
capacity constraint constructor now throws a useful error message rather than using an assert

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