split some classes to different namespaces to improve code base

No significant changes applied.

* function syntax has been changed to another one, any function may be called
  by using the following construction:

      $aw_function_name<some args here if any>{{function body if any}}

* rewrite travis.yml

sources/awesome-widget/plugin/awkeyoperations.h

@@ -0,0 +1,81 @@
+/***************************************************************************
+ *   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 AWKEYOPERATIONS_H
+#define AWKEYOPERATIONS_H
+
+#include <Plasma/DataEngine>
+
+#include <QMutex>
+#include <QObject>
+
+#include "extitemaggregator.h"
+
+
+class AWDataAggregator;
+class AWDataEngineAggregator;
+class AWKeysAggregator;
+class ExtQuotes;
+class ExtScript;
+class ExtUpgrade;
+class ExtWeather;
+class GraphicalItem;
+class QThreadPool;
+
+class AWKeyOperations : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString pattern READ pattern WRITE setPattern)
+
+public:
+    explicit AWKeyOperations(QObject *parent = nullptr);
+    virtual ~AWKeyOperations();
+    void addDevice(const QString source);
+    QStringList devices(const QString type) const;
+    QHash<QString, QStringList> devices() const;
+    void updateCache();
+    // keys
+    QStringList dictKeys() const;
+    GraphicalItem *giByKey(const QString key) const;
+    // values
+    QString infoByKey(QString key) const;
+    QString pattern() const;
+    void setPattern(const QString currentPattern);
+    // configuration
+    void editItem(const QString type);
+
+signals:
+    void updateKeys(const QStringList currentKeys);
+
+private:
+    // methods
+    void addKeyToCache(const QString type, const QString key = QString(""));
+    void reinitKeys();
+    // objects
+    ExtItemAggregator<GraphicalItem> *graphicalItems = nullptr;
+    ExtItemAggregator<ExtQuotes> *extQuotes = nullptr;
+    ExtItemAggregator<ExtScript> *extScripts = nullptr;
+    ExtItemAggregator<ExtUpgrade> *extUpgrade = nullptr;
+    ExtItemAggregator<ExtWeather> *extWeather = nullptr;
+    // variables
+    QHash<QString, QStringList> m_devices;
+    QString m_pattern;
+};
+
+
+#endif /* AWKEYOPERATIONS_H */