use stderr for SG_debug and SG_info
use stderr for SG_debug and SG_info

iychoi/syndicate-core,iychoi/syndicate-core,syndicate-storage/syndicate-core,syndicate-storage/syndicate-core,iychoi/syndicate-core,syndicate-storage/syndicate-core,syndicate-storage/syndicate-core,iychoi/syndicate-core