use sockets from MPD instead of running curl

sources/awesomewidgets/graphicalitemhelper.h

@@ -27,6 +27,8 @@ class QGraphicsScene;
 
 class GraphicalItemHelper : public QObject
 {
+    Q_OBJECT
+
 public:
     explicit GraphicalItemHelper(QObject *parent = nullptr,
                                  QGraphicsScene *scene = nullptr);

sources/awesomewidgets/owmweatherprovider.h

@@ -28,6 +28,8 @@
 
 class OWMWeatherProvider : public AbstractWeatherProvider
 {
+    Q_OBJECT
+
 public:
     explicit OWMWeatherProvider(QObject *parent, const int number);
     virtual ~OWMWeatherProvider();

sources/awesomewidgets/yahooweatherprovider.h

@@ -28,6 +28,8 @@
 
 class YahooWeatherProvider : public AbstractWeatherProvider
 {
+    Q_OBJECT
+
 public:
     explicit YahooWeatherProvider(QObject *parent, const int number);
     virtual ~YahooWeatherProvider();