[Dbix-class] more schema questions

[Alan Humphrey]

Doh!  Never mind.  Forgot the 'use' statement.

Incidentally, Matt, could you expound a bit on this piece of advice.  Both
seem to work and the docs show the former approach.  Thank you!

> my $obj = BirdWeb::Admin::Model::DBIC::Birds->find(234);

better

my $obj = BirdWeb::Admin::Model::DBIC->class('Birds')->find(234);