Replace yahoo finance to stooq (#131)

Old code is dropped to separated provider

sources/awesomewidgets/stooqquotesprovider.h

@@ -0,0 +1,42 @@
+/***************************************************************************
+ *   This file is part of awesome-widgets                                  *
+ *                                                                         *
+ *   awesome-widgets is free software: you can redistribute it and/or      *
+ *   modify it under the terms of the GNU General Public License as        *
+ *   published by the Free Software Foundation, either version 3 of the    *
+ *   License, or (at your option) any later version.                       *
+ *                                                                         *
+ *   awesome-widgets is distributed in the hope that it will be useful,    *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with awesome-widgets. If not, see http://www.gnu.org/licenses/  *
+ ***************************************************************************/
+
+#ifndef STOOQQUOTESPROVIDER_H
+#define STOOQQUOTESPROVIDER_H
+
+#include "abstractquotesprovider.h"
+
+
+class StooqQuotesProvider : public AbstractQuotesProvider
+{
+    Q_OBJECT
+
+public:
+    const char *STOOQ_QUOTES_URL = "https://stooq.com/q/l/";
+
+    explicit StooqQuotesProvider(QObject *_parent);
+    virtual ~StooqQuotesProvider();
+    void initUrl(const QString &_asset);
+    QVariantHash parse(const QByteArray &_source, const QVariantHash &_oldValues) const;
+    QUrl url() const;
+
+private:
+    QUrl m_url;
+};
+
+
+#endif /* STOOQQUOTESPROVIDER_H */