Create Add Weightsystem dialog

My first attempt to create a Qt dialog and to hook it up with the program.
Unsurprisingly this doesn't quite work as expected (i.e., the values I
enter aren't populated in the model), but it's a start...

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/addweightsystemdialog.h

@@ -0,0 +1,30 @@
+/*
+ * addweightsystemdialog.h
+ *
+ * header file for the add weightsystem dialog of Subsurface
+ *
+ */
+#ifndef ADDWEIGHTSYSTEMDIALOG_H
+#define ADDWEIGHTSYSTEMDIALOG_H
+
+#include <QDialog>
+#include "../dive.h"
+
+namespace Ui{
+	class AddWeightsystemDialog;
+}
+
+class AddWeightsystemDialog : public QDialog{
+	Q_OBJECT
+public:
+	explicit AddWeightsystemDialog(QWidget* parent = 0);
+	void setWeightsystem(weightsystem_t *ws);
+	void updateWeightsystem();
+
+private:
+	Ui::AddWeightsystemDialog *ui;
+	weightsystem_t *currentWeightsystem;
+};
+
+
+#endif