some improvements

* add plugin tree
* add emailnotify plugin template

sources/plugins/emailnotify/QueuedEmailNotify.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2017 Queued team
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ *
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+
+
+#ifndef QUEUEDEMAILNOTIFY_H
+#define QUEUEDEMAILNOTIFY_H
+
+#include <queued/QueuedPluginInterface.h>
+
+
+class QueuedEmailNotifyHelper;
+
+class QueuedEmailNotify : public QObject, public QueuedPluginInterface
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.queued.emailnotify/1.0")
+    Q_INTERFACES(QueuedPluginInterface)
+
+public:
+    virtual ~QueuedEmailNotify() = default;
+    void init(const QVariantHash &_settings) override;
+    void setToken(const QString &_token) override;
+    void setup(const QueuedPluginManagerInterface *_manager) override;
+    void updateSettings(const QString &_key, const QVariant &_value) override;
+
+private:
+    QueuedEmailNotifyHelper *m_helper = nullptr;
+    QString m_token;
+};
+
+
+#endif /* QUEUEDEMAILNOTIFY_H */