MultiChoice Enum constructor

[Avid29]

The ToolkitSampleMultiChoiceOptionAttribute could have a constructor that takes an Enum e in place of the choices, and generates the options using Enum.GetValues(e.GetType());

[Avid29]

If I understand the system correctly, it could then override TypeName which would make Enum conversion easier. Which seems important as Enums aren't currently supported it appears.

[michael-hawker]

Related to #149 and #207 as well.