[Entanglement] Add entanglement bundle

The entanglement bundle defines move, copy, and link actions, and
exposes them as context menu actions.

* The Move action moves an object from it's current parent to a new
parent object.
* The Copy action deep-copies an object to a new parent object.
* The Link action links an object to a new parent object.

These actions are implemented by three new services: moveService,
copyService, and linkService.

Mocks are provided for each service for easy testing of components
that depend on them.

Additionally, this bundle provides a DomainObjectFactory that simplifies
the construction of mockDomainObjects for tests.

These actions are exposed to the user as context menu options.

platform/entanglement/src/services/LocationService.js

@@ -0,0 +1,61 @@
+/*global define */
+
+define(
+    function () {
+        "use strict";
+
+        /**
+         * The LocationService allows for easily prompting the user for a
+         * location in the root tree.
+        */
+        function LocationService(dialogService) {
+            return {
+                /** Prompt the user to select a location.  Returns a promise
+                 * that is resolved with a domainObject representing the
+                 * location selected by the user.
+                 *
+                 * @param {string} title - title of location dialog
+                 * @param {string} label - label for location input field
+                 * @param {function} validate - function that validates
+                 *     selections.
+                 * @param {domainObject} initialLocation - tree location to
+                 *     display at start
+                 * @returns {Promise} promise for a domain object.
+                 */
+                getLocationFromUser: function (title, label, validate, initialLocation) {
+                    var formStructure,
+                        formState;
+
+                    formStructure = {
+                        sections: [
+                            {
+                                name: 'Location',
+                                rows: [
+                                    {
+                                        name: label,
+                                        control: "locator",
+                                        validate: validate,
+                                        key: 'location'
+                                    }
+                                ]
+                            }
+                        ],
+                        name: title
+                    };
+
+                    formState = {
+                        location: initialLocation
+                    };
+
+                    return dialogService
+                        .getUserInput(formStructure, formState)
+                        .then(function (formState) {
+                            return formState.location;
+                        });
+                }
+            };
+        }
+
+        return LocationService;
+    }
+);