Created a new dialog - Edit DiveComputer

Created a new dialog, Edit Divecomputer, it will currently only lists
the divecomputers that are used on the xml file. I used the same method
that the gtk version used, but only 2 divecomputers got visualized in the
dirk dive data. I'll assume that it's correct and will fix it in the next
couple of commits.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>

qt-ui/divecomputermanagementdialog.h

@@ -0,0 +1,22 @@
+#ifndef DIVECOMPUTERMANAGEMENTDIALOG_H
+#define DIVECOMPUTERMANAGEMENTDIALOG_H
+#include <QDialog>
+
+class DiveComputerModel;
+namespace Ui{
+	class DiveComputerManagementDialog;
+};
+
+class DiveComputerManagementDialog : public QDialog{
+Q_OBJECT
+
+public:
+    static DiveComputerManagementDialog *instance();
+	void update();
+private:
+    explicit DiveComputerManagementDialog(QWidget* parent = 0, Qt::WindowFlags f = 0);
+    Ui::DiveComputerManagementDialog *ui;
+	DiveComputerModel *model;
+};
+
+#endif