Return to owm weather provider

Since yahoo support already exists, so I've added new option
X-AW-Provider (apiver 3). Added tests for these cases

sources/awesomewidgets/extscript.h

@@ -37,7 +37,12 @@ class ExtScript : public AbstractExtItem
     Q_PROPERTY(Redirect redirect READ redirect WRITE setRedirect)
 
 public:
-    enum class Redirect { stdout2stderr = 0, nothing = 1, stderr2stdout = 2, swap = 3 };
+    enum class Redirect {
+        stdout2stderr = 0,
+        nothing = 1,
+        stderr2stdout = 2,
+        swap = 3
+    };
 
     explicit ExtScript(QWidget *parent, const QString filePath = QString());
     virtual ~ExtScript();