Redisign of the exam creator GUI. This is still a dummy application, as most signals are not connected, or the callback methods are not implemented.

The "Add Question" button is connected to a QDialog with shows the minimal configuration to create a question: text and 2 possible answers.
TODO (Add Question)
- Validate input.
- Enable check for correct answer.

The "Edit Exam Headers" button dislays a QDialog in where you can input some basic exam config. It's not functional yet
Committing a Simple Tree Model module, that represents the MVC version of a QTreeWidget. This will work as a foundation for a more complex widget, with extra features.

Gist: https://gist.github.com/jvrplmlmn/6649760