Converts values on attribute name to instances of model type.
$.Model.extend("Task",{ init : function(){ this.hasMany("Person","people"); } },{})
$.Model.hasMany(type, name) -> undefined
{String}
The string name of the model.
{optional:String}
The name of the property. Defaults to the shortName of the model with an "s" at the end.
{undefined}
Converts values on attribute name to instances of model type.