Add function ardprintf for print decimal int/long int/decimal floating point/character/string.

  ex :
    int   l  = 2;
    long  j  = 123456789;
    float k  = 2.3;
    char  s  = 'g';
    char *t  = "test";

    ardprintf("%d %l %f %c %s", l, j, k, s, t);

refs :
http://arduino.stackexchange.com/questions/176/how-do-i-print-multiple-variables-in-a-string