+ new test to check everything compiles
+ Model inheritance re-organised
+ New config method : additional, for stashing additional info, especially from additional_data method
+ new warn method in maypole/request class/object, over-ridden by Apache::MVC, etc or own driver
+ AsForm fixes to stringification _to_select
+ new build_form_elements attribute for Maypole request, set it to 0 to avoid building cgi form if you don't need it
+ made DFV and FromCGI warn instead of die on unexpected cgi params
+ added CGI params to TT error template