[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/test/services/MockLinkService.js

@@ -0,0 +1,78 @@
+/*global define,jasmine */
+
+define(
+    function () {
+        "use strict";
+
+        /**
+         * MockLinkService provides the same interface as the linkService,
+         * returning promises where it would normally do so.  At it's core,
+         * it is a jasmine spy object, but it also tracks the promises it
+         * returns and provides shortcut methods for resolving those promises
+         * synchronously.
+         *
+         * Usage:
+         *
+         * ```javascript
+         * var linkService = new MockLinkService();
+         *
+         * // validate is a standard jasmine spy.
+         * linkService.validate.andReturn(true);
+         * var isValid = linkService.validate(object, parentObject);
+         * expect(isValid).toBe(true);
+         *
+         * // perform returns promises and tracks them.
+         * var whenLinked = jasmine.createSpy('whenLinked');
+         * linkService.perform(object, parentObject).then(whenLinked);
+         * expect(whenLinked).not.toHaveBeenCalled();
+         * linkService.perform.mostRecentCall.resolve('someArg');
+         * expect(whenLinked).toHaveBeenCalledWith('someArg');
+         * ```
+         */
+        function MockLinkService() {
+            // track most recent call of a function,
+            // perform automatically returns
+            var mockLinkService = jasmine.createSpyObj(
+                'MockLinkService',
+                [
+                    'validate',
+                    'perform'
+                ]
+            );
+
+            mockLinkService.perform.andCallFake(function () {
+                var performPromise,
+                    callExtensions,
+                    spy;
+
+                // TODO: return a proper deferred to support composing.
+                performPromise = jasmine.createSpyObj(
+                    'performPromise',
+                    ['then']
+                );
+
+                callExtensions = {
+                    promise: performPromise,
+                    resolve: function (resolveWith) {
+                        performPromise.then.calls.forEach(function (call) {
+                            call.args[0](resolveWith);
+                        });
+                    }
+                };
+
+                spy = this.perform;
+
+                Object.keys(callExtensions).forEach(function (key) {
+                    spy.mostRecentCall[key] = callExtensions[key];
+                    spy.calls[spy.calls.length - 1][key] = callExtensions[key];
+                });
+
+                return performPromise;
+            });
+
+            return mockLinkService;
+        }
+
+        return MockLinkService;
+    }
+);