tuned signature (again);

tuned --- following hints by IntelliJ;

tuned comments;

proper shell quote;

removed spurious references to perl / libwww-perl;

invoke remote ATP via SystemOnTPTP.run_systems from Isabelle/Scala (without perl); clarified inlined command-line; clarified errors: exception ERROR becomes UnknownError (it could stem from Scala function);

clarified signature: refer to file name instead of file content;

compile;

clarified signature: more explicit types;

support for SystemOnTPTP.run_system, with strict error following scripts/remote_atp;