Removed config.h as it seems redundant

config.h

-#if !defined(_config_h)
-# define _config_h
-
-# include <iostream>
-
-# define OUT(t) std::cout<<#t "="<<t<<std::endl;
-
-# if defined(_MSC_VER) && (_MSC_VER < 1300)
-
-#  define Xmin(a, b) ( ((a) < (b)) ? (a) : (b) )
-#  pragma warning ( disable : 4786 ) /* identifier truncated in debug info */
-
-#include <cstdlib>
-#include <cmath>
-
-namespace std { 
-	using ::abs;
-	using ::sqrt;
-	using ::atan;
-	using ::tanh;
-	using ::log;
-	using ::pow;
-	using ::exp;
-}
-
-# else
-#  define Xmin(a, b) ( std::min( (a), (b) ) )
-# endif
-
-#endif