Ensure pickling works even with signkey that isn't 16 bytes
Ensure pickling works even with signkey that isn't 16 bytes

choptastic/nitrogen_core,choptastic/nitrogen_core,nitrogen/nitrogen_core,stuart-thackray/nitrogen_core,choptastic/nitrogen_core,SovereignPrime/nitrogen_core,SovereignPrime/nitrogen_core,stuart-thackray/nitrogen_core,nitrogen/nitrogen_core,nitrogen/nitrogen_core,SovereignPrime/nitrogen_core,nitrogen/nitrogen_core,stuart-thackray/nitrogen_core