ui: implemented gui abstraction and dummy view

- added abstract class tree for gui elements.
- implemented concrete gui classes that wrap the qt specific content.
- implemented first DummyView which plays nice with the ViewManager.

review id = 12

src/lib/component/view/CodeView.h

@@ -1,11 +0,0 @@
-#ifndef CODE_VIEW_H
-#define CODE_VIEW_H
-
-#include "component/view/View.h"
-
-class CodeView: public View
-{
-};
-
-
-#endif // CODE_VIEW_H