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/LongTag.h

@@ -4,10 +4,10 @@
 class LongTag : public Tag
 {
 public:
-	__int64 data;
+	int64_t data;
 	LongTag(const wstring &name) : Tag(name) {}
-	LongTag(const wstring &name, __int64 data) : Tag(name) {this->data = data; }
-	
+	LongTag(const wstring &name, int64_t data) : Tag(name) {this->data = data; }
+
 	void write(DataOutput *dos) { dos->writeLong(data); }
 	void load(DataInput *dis) { data = dis->readLong(); }