Don't use std::string in the plugin, convert when communicating with the engine

src/plugin/PluginSettings.h

 /**
 * This class contains all client functionality of the IE plugin
 *
 * Exception errors are tested by calls to ExceptionsTest from: Main ...
 */
 
 #ifndef _PLUGIN_SETTINGS_H_
 #define _PLUGIN_SETTINGS_H_
 
 
@@ skipping 182 matching lines @@
 
   void RefreshTab();
 
   int GetTabVersion(const CString& key) const;
   void IncrementTabVersion(const CString& key);
 
   // Settings whitelist
 #ifdef SUPPORT_WHITELIST
 
 private:
-  std::vector<std::string> m_whitelistedDomains;
+  std::vector<std::wstring> m_whitelistedDomains;
 
   void ClearWhitelist();
   bool ReadWhitelist(bool bDebug=true);
 
 public:
   void AddWhiteListedDomain(const CString& domain);
   void RemoveWhiteListedDomain(const CString& domain);
   int GetWhiteListedDomainCount() const;
-  std::vector<std::string> GetWhiteListedDomainList();
+  std::vector<std::wstring> GetWhiteListedDomainList();
 #endif //SUPPORT_WHITELIST
 
   bool RefreshWhitelist();
   DWORD GetWindowsBuildNumber();
 
-  void SetSubscription(BSTR language);
-  void SetSubscription(std::string language);
+  void SetSubscription(const std::wstring& url);
   void SetDefaultSubscription();
   CString GetSubscription();
   void RefreshFilterlist();
 
   std::vector<SubscriptionDescription> m_subscriptions;
 };
 
 
 #endif // _PLUGIN_SETTINGS_H_