Support for has-many type relations

[bfeaver]

Would be nice to setup Blueprints that will automatically insert some number of has-many relations.

Such as from machinist:

Post.blueprint do
  comments(3)  # Makes 3 comments.
end

[stephans]

Yeah, trying to figure out a good not annoying syntax for this.. maybe something like

Machinist::Blueprint('stuff', array(
  'OtherStuff' => Machinist::Relationship('otherstuff')->hasMany()->foreign("stuff_id')->create(3);
));