用CIMExporter分别处理读到的线路，开关，变压器等元件。

Signed-off-by: facat@lab.com <facat@lab.com>

testHasttable/element/switch.h

@@ -1,11 +1,12 @@
 #ifndef SWITCH_H
 #define SWITCH_H
+#include <QObject>
 #include <QPair>
 #include "branch.h"
 class Switch:public Branch
 {
 public:
-    Switch(const QPair<QString, QString> &fromTo);
+    Switch(const QPair<QString, QString> &fromTo,QObject *parent=0);
 protected:
     virtual void extract();