[html-formfu] model_config changes - back to last release behaviour

[Carl Franks]

I've changed HTML-FormFu-Model-DBIC so that it expects the config in:
    model_config:
        stuff: here

rather than:
    model_config
      DBIC:
        stuff: here

(See previous threads over the past few months, for why)

This matches the behaviour of the last CPAN release.
Apologies to anyone who's been following svn, you've going to have to
change your config.
(Yes, I've got a couple of apps myself I'm going to have to change back).

Consider this now written in stone ;)

Cheers,
Carl