Use libadblockplus update checker

src/engine/Updater.h

 #ifndef UPDATER_H
 #define UPDATER_H
 
 #include <string>
 #include <Windows.h>
 #include <AdblockPlus/JsEngine.h>
 
 class Updater
 {
 public:
   Updater(AdblockPlus::JsEnginePtr jsEngine, const std::string& url);
-  void StartUpdate();
-  void StartDownload(HWND dialog);
-  void RunDownload();

[Wladimir Palant, 2013/06/06 15:22:53]

I don't think that the two functions above still need to be public, that's a
left-over from some changes.

[Felix Dahlke, 2013/06/06 17:44:00]

Don't think so either :)

+  void Update();
 private:
   AdblockPlus::JsEnginePtr jsEngine;
   std::string url;
   std::wstring tempFile;
   HWND dialog;
+
+  void StartDownload(HWND dialog);
+  void RunDownload();
 };
 
 #endif // UPDATER_H