Print program name and version only in help screen and when -V is set.

README

 
 |----------------------------------------------------------------------|
 gf@gf:~/git/videohubctrl$ ./videohubctrl --host sdi-matrix
-videohubctrl Version: 0.1 Git: 0.1
-
 Protocol version: 2.4
 Model name: Blackmagic Micro Videohub
 Unique ID: 7c2e0d021714

videohubctrl.c

 };
 
 static void show_help(struct videohub_data *data) {
+	printf("%s\n", program_id);
 	printf("\n");
 	printf(" Usage: " PROGRAM_NAME " --host <host> [..commands..]\n");
 	printf("\n");
 				show_help(data);
 				exit(EXIT_SUCCESS);
 			case 'V': // --version
-				// program_id is already printed on startup, just exit.
+				printf("%s\n", program_id);
 				exit(EXIT_SUCCESS);
 		}
 	}
 int main(int argc, char **argv) {
 	struct videohub_data *data = &maindata;
 
-	printf("%s\n", program_id);
-
 	parse_options(data, argc, argv);
 	set_log_io_errors(0);