UserDataDir, AppDataDir, CacheDir added

src/gui/qt/qttools/qthelper/qthelper.cpp

@@ -57,3 +57,7 @@ QString QtHelper::getDataPath()
     	return QDir::cleanPath(path) + "/";
 }
 
+std::string QtHelper::getDataPathStdString()
+{
+    	return getDataPath().toUtf8().constData();
+}

src/gui/qt/qttools/qthelper/qthelper.h

@@ -27,6 +27,7 @@ public:
     std::string getDefaultLanguage();
 
     QString getDataPath();
+    std::string getDataPathStdString();	
 
 };