override ToString() on IFieldWrapper?

[WickyNilliams]

Might be worth considering overriding tostring so you don't have to constantly call Render on a field. I can't think off the top of my head any issues this might arise - I never use IFieldWrapper's standard ToString() (which just returns the type name currently) so i don't see why a change like this might be problematic?

That way it can can neatly be used in webforms like:

<%= myItemWrapper.myFieldWrapper %>