give more time to do inital loggin and settings read

log start of test session

tuned interfaces -- plain prover function, without thread; misc tuning and simplification; reduced NJ basis library stuff to bare minimum;

add_prover: plain prover function, without thread; removed obsolete atp_thread interface; moved kill_excessive into main thread manager loop -- avoids race condition wrt. register/unregister; start_prover: register/unregister self -- avoids race condition;

tuned AtpWrapper interfaces;

continued codegen tutorial

renamed AtpThread to AtpWrapper;

adding preferences is now permissive;

tuned;

adding preferences is now permissive, no error handling here; tuned messages;