add oversampler

oversampling/WDL/giflib/config.h

@@ -0,0 +1,14 @@
+#ifndef _CONFIG_H_
+#define _CONFIG_H_
+#ifdef _WIN32
+#include <windows.h>
+#include <io.h>
+#define _OPEN_BINARY
+#else
+typedef unsigned int UINT32;
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#endif
+#include <fcntl.h>
+#endif