Stream inflated EPUB HTMLs down to disk instead of inflating in memory (#4)

* Downgrade miniz for stability

* Stream HTML from ZIP down to disk instead of loading all in mem

lib/ZipFile/ZipFile.h

@@ -1,12 +1,19 @@
 #pragma once
+#include <Print.h>
+
+#include <functional>
 #include <string>
 
+#include "miniz.h"
+
 class ZipFile {
   std::string filePath;
+  bool loadFileStat(const char* filename, mz_zip_archive_file_stat* fileStat) const;
+  long getDataOffset(const mz_zip_archive_file_stat& fileStat) const;
 
  public:
   explicit ZipFile(std::string filePath) : filePath(std::move(filePath)) {}
   ~ZipFile() = default;
-  char* readTextFileToMemory(const char* filename, size_t* size = nullptr) const;
   uint8_t* readFileToMemory(const char* filename, size_t* size = nullptr, bool trailingNullByte = false) const;
+  bool readFileToStream(const char* filename, Print& out, size_t chunkSize) const;
 };