merged

obsolete;

clarified interactive mode, which is relevant for ML prompts;

more careful print_depth on startup;

ignore SIGINT in waiting wrapper process; proper "bash_process.c" and "build" within component;

more robust cleanup; more defensive timing value;

isabelle.Build uses ML_Process directly; isabelle_process is for batch mode only; removed unused feeder (already part of "isabelle console");

tuned;

print timing like lib/scripts/timestop.bash;

prefer explicit locale;