MdAutocompleteCtrl.select - add val argument

[dkemper01]

On the Contact Chips demo, a welcome user experience would be to click a contact and have it automatically added to the list of selected contacts. From what I gather, this may require an additional argument in the select method of the MdAutocompleteCtrl (auto-complete controller, autocompleteController.js).

The new argument I am proposing would simply be "val", representing a single value in the items list, which currently originates from var items = $scope.$parent.$eval(itemExpr) (line 517, autocompleteController.js). The idea being; an ng-click handler could be added to a contact chip md-list-item in the demo such that the auto-complete control would auto-update its collection of items.

[dkemper01]

This is easily accomplished by modifying the existing pen for the contact chips demo such that ng-click executes a method in the controller that simply adds the selected contact from the collection of all contacts to the contacts collection of the md-contact-chips.

In the markup ...

<md-list-item class="md-2-line contact-item" ng-repeat="(index, contact) in ctrl.allContacts" ng-if="ctrl.contacts.indexOf(contact) < 0" ng-click="ctrl.selectChip(index)">

In the controller ...

self.selectChip = selectChip;

 function selectChip(index) {
      console.log(index);
        self.contacts.push(self.allContacts[index]);
    }

[topherfangio]

Please note: my above commit didn't actually do anything with this issue, I simply transposed the digits in the issue number :/