Add --raw flag

Updated dbus API. Now it sends a signal with every capture, it may
be captureFailed or a captureTaken which contains the raw image
bytes in png format. You have to add an id to the screenshot calls
so it will be returned as a way to know the origin of the signal.

src/utils/dbusutils.h

@@ -0,0 +1,42 @@
+// Copyright 2017 Alejandro Sirgo Rica
+//
+// This file is part of Flameshot.
+//
+//     Flameshot 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.
+//
+//     Flameshot 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 Flameshot.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef TERMINALUTILS_H
+#define TERMINALUTILS_H
+
+#include "src/cli/commandlineparser.h"
+#include <QDBusConnection>
+#include <QObject>
+
+class DBusUtils : public QObject
+{
+    Q_OBJECT
+public:
+    explicit DBusUtils(QObject *parent = nullptr);
+    explicit DBusUtils(uint id, QObject *parent = nullptr);
+
+    void checkDBusConnection(const QDBusConnection &connection);
+
+public slots:
+    void captureTaken(uint id, QByteArray rawImage);
+    void captureFailed(uint id);
+
+private:
+    uint m_id;
+};
+
+#endif // TERMINALUTILS_H