API cleanup, get rid of JsObject and GetProperty() methods that don`t return JsValue

include/AdblockPlus/JsValue.h

 #ifndef ADBLOCKPLUS_JS_VALUE_H
 #define ADBLOCKPLUS_JS_VALUE_H
 
 #include <string>
 #include <vector>
 #include <v8.h>
 #include "tr1_memory.h"
 
 namespace AdblockPlus
 {
   class JsValue;
   class JsEngine;
 
   typedef std::tr1::shared_ptr<JsValue> JsValuePtr;
   typedef std::vector<AdblockPlus::JsValuePtr> JsValueList;
 
   // Forward declaration to avoid including JsEngine.h
   typedef std::tr1::shared_ptr<JsEngine> JsEnginePtr;
 
   class JsValue
   {
     friend class JsEngine;
-    friend class JsObject;
+    friend class Filter;
+    friend class Subscription;
   public:
     virtual ~JsValue();
 
     bool IsUndefined() const;
     bool IsNull() const;
     bool IsString() const;
     bool IsNumber() const;
     bool IsBool() const;
     bool IsObject() const;
     bool IsArray() const;
@@ skipping 22 matching lines @@
   protected:
     JsValue(JsEnginePtr jsEngine, v8::Handle<v8::Value> value);
     void SetProperty(const std::string& name, v8::Handle<v8::Value> val);
 
     JsEnginePtr jsEngine;
     v8::Persistent<v8::Value> value;
   };
 }
 
 #endif