can-connect/can/constructor-hydrate/

#243

The can-connect/can/constructor-hydrate/constructor-hydrate behavior allows to check the connection instanceStore when creating new instances of the connected Map type.

It should be used with can-connect/constructor/store and can-connect/can/map/map behaviors:

var Student = DefineMap.extend({});
Student.List = DefineList.extend({
    '#': { Type: Student }
});

Student.connection = connect([
    require("can-connect/data/url/url"),
    require("can-connect/constructor/constructor"),
    require("can-connect/constructor/store/store"),
    require("can-connect/can/map/map"),
    require("can-connect/can/constructor-hydrate/constructor-hydrate"),
], {
    Map: Student,
    List: Student.List,
    url: "api/students"
});

Now if we try to create two instances with the same id they both will be the same instance:

Student.get({id: 1}).then(function(instance){
    var student = instance;

    var teamLead = new Student({id: 1});

    student === teamLead;
});