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

src/GlobalJsObject.h

 #ifndef ADBLOCK_PLUS_GLOBAL_JS_OBJECT_H
 #define ADBLOCK_PLUS_GLOBAL_JS_OBJECT_H
 
 #include <v8.h>
 
 namespace AdblockPlus
 {
   class AppInfo;
   class JsEngine;
 
   namespace GlobalJsObject
   {
-    v8::Handle<v8::ObjectTemplate> Create(const AppInfo& appInfo,
-                                          JsEngine& jsEngine);
+    JsValuePtr Setup(JsEngine& jsEngine, const AppInfo& appInfo, JsValuePtr obj);
   }
 }
 
 #endif