Cleaned up handling of --verbose, proposing correct use of log levels from now on...

FATAL_LOG_LEVEL: Use, if we are going to crash.
ERROR_LOG_LEVEL: Use, if there is no reasonable way to continue.
WARN_LOG_LEVEL: Use, if we got something the average user should read.
INFO_LOG_LEVEL: Use, if this might in some cases be of interest.
DEBUG_LOG_LEVEL: Use, if this should usually not be relevant to a user.
TRACE_LOG_LEVEL: Use only during development.

There are three levels of verbosity:
- default: WARN and above
- verbose: INFO and above
- debug: DEBUG and above

src/storm.cpp

@@ -48,7 +48,7 @@ log4cplus::Logger logger;
  */
 void initializeLogger() {
 	logger = log4cplus::Logger::getInstance(LOG4CPLUS_TEXT("main"));
-	logger.setLogLevel(log4cplus::INFO_LOG_LEVEL);
+	logger.setLogLevel(log4cplus::WARN_LOG_LEVEL);
 	log4cplus::SharedAppenderPtr consoleLogAppender(new log4cplus::ConsoleAppender());
 	consoleLogAppender->setName("mainConsoleAppender");
 	consoleLogAppender->setLayout(std::auto_ptr<log4cplus::Layout>(new log4cplus::PatternLayout("%-5p - %D{%H:%M:%S} (%r ms) - %b:%L: %m%n")));
@@ -115,18 +115,17 @@ bool parseOptions(const int argc, const char* argv[]) {
 		return false;
 	}
 	
-	if (!s->isSet("verbose") && !s->isSet("logfile")) {
-		logger.setLogLevel(log4cplus::FATAL_LOG_LEVEL);
-	} else if (!s->isSet("verbose")) {
-		logger.removeAppender("mainConsoleAppender");
-		setUpFileLogging();
-	} else if (!s->isSet("logfile")) {
+	if (s->isSet("verbose")) {
+		logger.setLogLevel(log4cplus::INFO_LOG_LEVEL);
 		LOG4CPLUS_INFO(logger, "Enable verbose mode, log output gets printed to console.");
-	} else {
+	}
+	if (s->isSet("debug")) {
+		logger.setLogLevel(log4cplus::DEBUG_LOG_LEVEL);
+		LOG4CPLUS_INFO(logger, "Enable very verbose mode, log output gets printed to console.");
+	}
+	if (s->isSet("logfile")) {
 		setUpFileLogging();
-		LOG4CPLUS_INFO(logger, "Enable verbose mode, log output gets printed to console.");
 	}
-
 	return true;
 }