Connect to feathers and merge model data easier

• Added can-connect-feathers to ecosystem. Use it to make a seamless connection to a real-time FeathersJS socket or http service layer. It also helps make sessions, login and logout very easy.

  // make a connection
  connect([..., feathersSession, ...],{
    Map: Session,
    ...
  });
  
  // get the session
  Session.current
  
  // login
  new Session( ... ).save();
  
  // logout
  Session.current.destroy();

• can-connect 1.1.0 - Adds can-connect/helpers/map-deep-merge module. This is used to merge data into DefineMap and DefineLists with minimal changes:

  var deepMapMerge = require("can-connect/helpers/map-deep-merge");
  
  deepMapMerge( classRoom, {
    id: 5,
    name: "math",
    students: [{id: 1, name: "ilya"}, {id: 2, name: "Justin"}],
    teacher: {name: "Ms. Ramiya"}
  });

• can-connect 1.2.0 - Adds can-connect/can/merge/merge behavior. This makes a connection use mapDeepMerge. Use it if you have nested model data!

  var canMergeBehavior = require("can-connect/can/merge/merge");
  ClassRoom.connection = connect([ ..., canMergeBehavior, ...], {
    Map: ClassRoom,
    ...
  })

• can-define 1.0.14 - Use async setters like:

  var Type = define.Constructor({
    prop: {
        value: 2,
        set: function(num, resolve){
            resolve( num * num );
        }
    }
  });

• can-define 1.0.15 - list.sort() doesn't clone objects.

• can-stache 3.0.18 - supports foo[bar].baz and foo[%index].

• Added can-validate-legacy