Implement detailed error message for save_load
Implement detailed error message for save_load

kmaehashi/jubatus,gintenlabo/jubatus,jubatus/jubatus,rimms/jubatus_core,roselleebarle04/jubatus,kmaehashi/jubatus_core,gintenlabo/jubatus_core,kmaehashi/jubatus,Asuka52/jubatus,kumagi/jubatus_core,gintenlabo/jubatus_core,rimms/jubatus_core,kmaehashi/jubatus_core,roselleebarle04/jubatus,kumagi/jubatus_core,jubatus/jubatus,elkingtonmcb/jubatus,mathn/jubatus,elkingtonmcb/jubatus,rimms/jubatus_core,kmaehashi/jubatus_core,Asuka52/jubatus,kmaehashi/jubatus_core,jubatus/jubatus,kumagi/jubatus_core,rimms/jubatus,kumagi/jubatus_core,gintenlabo/jubatus_core,rimms/jubatus_core,mathn/jubatus,gintenlabo/jubatus_core,rimms/jubatus,gintenlabo/jubatus