Split off lots of editor functionality into new abstract INodeEditor class and viewport functionality into CBasicViewport class; added viewport subclasses and undo/redo system in the World Editor

UI/undo/CSelectNodeCommand.h

@@ -0,0 +1,19 @@
+#ifndef CSELECTNODECOMMAND_H
+#define CSELECTNODECOMMAND_H
+
+#include <QUndoCommand>
+#include "../INodeEditor.h"
+#include <Scene/CSceneNode.h>
+
+class CSelectNodeCommand : public QUndoCommand
+{
+    INodeEditor *mpEditor;
+    CSceneNode *mpNode;
+    QList<CSceneNode*> *mpSelection;
+public:
+    CSelectNodeCommand(INodeEditor *pEditor, CSceneNode *pNode, QList<CSceneNode*>& selection);
+    void undo();
+    void redo();
+};
+
+#endif // CSELECTNODECOMMAND_H