Fixed Logger documentation.

   /// 

   /// The header usually contains title of the program.

   ///

   /// \param title String containing the header title.

   /// \param title A String containing the header title.

   void writeHeader( const String& title );

   /// \brief Creates separator used as a log structure.

   protected:

   /// \brief Integer defining the width of the log.

   int width;

   /// \brief Output stream where the log will be printed out.

   std::ostream& stream;

};