[feature] - resolve complex field in type

[imiskolee]

type FieldA {
   id : Int!
   name: String!
}

type ComplexField {
    Items:[FieldA]
}

will be parse to

type ComplexField struct {
	ItemsID int
}
type FieldA struct {
	ID   int
	Name string
}

if FieldA is related to another model,its fine. but its not good when FieldA just is a Field of ComplexField(In Mysql 5.7 support JSON data type), i want we has a way to generate it to

type ComplexField struct {
	Items []FieldA
}

type FieldA struct {
	ID   int
	Name string
}

[vektah]

There was a little bit of chatter around this in #80 and #78

I think the current approach is to hand roll your database models (or generate them and copy them out, or use a ORM that generates models for you) and bind to them in types.json. There are going to be too many edge cases to cater for everyone.