new option to verify syntax and parameters of config file

cdoc for logging class

inc/Config.h

@@ -16,7 +16,19 @@ public:
     static std::string telegramApiKey;
     static std::string chatId;
 
+    /**
+     * read configuration out of config file
+     *
+     * @return success of config read
+     */
     static bool readCredentials();
 
+    /**
+     * validate config file
+     *
+     * @return validity of config file
+     */
+    static bool validateConfig();
+
 private:
 };

inc/Logger.h

@@ -8,13 +8,38 @@
 
 class Logger {
 public:
+    /**
+     * a debug message
+     * @param message message
+     */
     static void debug(std::string message);
+
+    /**
+     * a default message
+     * @param message message
+     */
     static void message(std::string message);
+
+    /**
+     * a warning message
+     * @param message message
+     */
     static void warning(std::string message);
+
+    /**
+     * a error message
+     * @param message message
+     */
     static void error(std::string message);
 
+    /**
+     * a log message with manual level set
+     * @param message message
+     * @param level loglevel (1-4) or predefined labels
+     */
     static void log(const std::string &message, int level);
 
+
     static const int Debug = 4;
     static const int Message = 3;
     static const int Warning = 2;