be more verbose when running each child decoder process when forking. also, avoid some non-bash errors
be more verbose when running each child decoder process when forking. also, avoid some non-bash errors

pks/cdec-dtrain,pks/cdec-dtrain,m5w/atools,carhaas/cdec-semparse,redpony/cdec,redpony/cdec,redpony/cdec,redpony/cdec,carhaas/cdec-semparse,redpony/cdec,pks/cdec-dtrain,m5w/atools,carhaas/cdec-semparse,veer66/cdec,pks/cdec-dtrain,carhaas/cdec-semparse,redpony/cdec,veer66/cdec,pks/cdec-dtrain,m5w/atools,carhaas/cdec-semparse,pks/cdec-dtrain,veer66/cdec,veer66/cdec,veer66/cdec,carhaas/cdec-semparse,veer66/cdec