The goal is to make C icm expansion more simple and readable.

        * Replace fprintf(gobal.outfile with `out` and `indout`
          mainly for aesthetic purposes.  Function `indout` is
          indented out, and is expanded to {INDENT; out (...)}.

        * Reorganize ICM templates like COND1, FOR_LOOP, etc
          to avoid statement passing as macro-parameters.  Instead
          every template consists of _BEGIN and _END part, like
          for example:
                FOR_LOOP_BEGIN ("int SAC_i = 0; SAC_i < 3; SAC_i++")
                        // Do something here
                FOR_LOOP_END ();