AnvilStats: Added ChunkExtract mode of operation, splitting Anvil files into individual chunks.

Both original zlibbed chunks and re-gzipped chunks are output.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1223 0a769ca7-a7f5-676a-18bf-c427514a06d6

source/OSSupport/GZipFile.h

@@ -37,7 +37,9 @@ public:
 	int ReadRestOfFile(AString & a_Contents);
 	
 	/// Writes a_Contents into file, compressing it along the way. Returns true if successful. Multiple writes are supported.
-	bool Write(const AString & a_Contents);
+	bool Write(const AString & a_Contents) { return Write(a_Contents.data(), (int)(a_Contents.size())); }
+	
+	bool Write(const char * a_Data, int a_Size);
 	
 protected:
 	gzFile m_File;