Get rid of MSVC's __int64

Use either int64_t, uint64_t or long long and unsigned long long, defined as per C++11 standard

Minecraft.World/ZoneIo.h

@@ -7,10 +7,10 @@ class ZoneIo
 {
 private:
     HANDLE channel;
-    __int64 pos;
+    int64_t pos;
 
 public:
-	ZoneIo(HANDLE channel, __int64 pos);
+	ZoneIo(HANDLE channel, int64_t pos);
     void write(byteArray bb, int size);
     void write(ByteBuffer *bb, int size);
     ByteBuffer *read(int size);