Update Readme.md - pragma-libs in How to compile

Alexey

2017-01-02 b5938098d12d5c9fe48e7cc71ae3d75b7306833f

 src/demo.c

@@ -7,7 +7,10 @@
#include "box.h"
#include "image.h"
#include "demo.h"
#include <sys/time.h>
//#include <sys/time.h>
#include <time.h>
#include <winsock.h>
#include "gettimeofday.h"

#define FRAMES 3