Implement new methods and modify some methods and abolish maus.j .

- Abolish maus.j(). Instead of maus.j, you can call maus.J() without the
    "new" operator.
- Modify the following methods
    - maus.Select.get()
    - maus.Select.set()
    - maus.CheckBox.get()
    - maus.CheckBox.set()
- Implement the following methods.
    - maus.Select.toggleValue()
    - maus.CheckBox.toggleValue()
    - maus.BoolCheckBox.toggleValue()