Simplify context setup, set properties on the global object directly instead of using templates

include/AdblockPlus/JsEngine.h

 #ifndef ADBLOCKPLUS_JS_ENGINE_H
 #define ADBLOCKPLUS_JS_ENGINE_H
 
 #include <stdexcept>
 #include <string>
 #include <v8.h>
 #include <AdblockPlus/JsValue.h>
 
 namespace AdblockPlus
 {
+  struct AppInfo;
   class FileSystem;
   class WebRequest;
   class ErrorCallback;
 
   class JsError : public std::runtime_error
   {
   public:
     explicit JsError(const v8::Handle<v8::Value> exception,
         const v8::Handle<v8::Message> message);
   };
 
   class JsEngine
   {
     friend class JsValue;
 
   public:
-    JsEngine(FileSystem* const fileReader,
+    JsEngine(const AppInfo& appInfo,
+             FileSystem* const fileReader,
              WebRequest* const webRequest,
              ErrorCallback* const errorCallback);
     JsValuePtr Evaluate(const std::string& source,
         const std::string& filename = "");
     void Load(const std::string& scriptPath);
     void Gc();
     JsValuePtr NewValue(const std::string& val);
     JsValuePtr NewValue(int64_t val);
     JsValuePtr NewValue(bool val);
     inline JsValuePtr NewValue(const char* val)
@@ skipping 37 matching lines @@
   private:
     FileSystem& fileSystem;
     WebRequest& webRequest;
     ErrorCallback& errorCallback;
     v8::Isolate* isolate;
     v8::Persistent<v8::Context> context;
   };
 }
 
 #endif