Better support for ExpandoObject based Forms

[Aaltuj]

At the moment VxFormGenerator supports rendering a Form based on a ExpandoObject. This allows the EditForm components to store the inputted values.

Approach described here:
#16 (comment)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.