[Framework] Begin adding registration phase

Begin implementation registration phase of framework
layer initialization process. This phase is responsible
for registering resolved extensions with Angular, in a
manner than individual extensions can later request
dependencies from. WTD-518.

platform/framework/src/FrameworkInitializer.js

@@ -0,0 +1,65 @@
+/*global define,Promise*/
+
+/**
+ * Module defining FrameworkInitializer. Created by vwoeltje on 11/3/14.
+ */
+define(
+    [],
+    function () {
+        "use strict";
+
+        /**
+         *
+         * @constructor
+         * @param {BundleLoader} loader
+         * @param {ExtensionResolver} resolver
+         * @param {ExtensionRegistrar} registrar
+         * @param {ApplicationBootstrapper} bootstrapper
+         */
+        function FrameworkInitializer(loader, resolver, registrar, bootstrapper) {
+
+            function registerExtensions(resolvedExtensions) {
+                Object.keys(resolvedExtensions).forEach(function (category) {
+                    registrar.registerExtensions(
+                        category,
+                        resolvedExtensions[category]
+                    );
+                });
+            }
+
+            /**
+             *
+             * @param bundles
+             * @returns {Object.<string, object[]>} an object mapping
+             */
+            function resolveExtensions(bundles) {
+                var resolvedExtensions = {};
+
+
+                function resolveExtensionsForBundle(bundle) {
+
+                }
+
+                return Promises.all(bundles.map(resolveExtensionsForBundle)).then(function () {
+                    return resolvedExtensions;
+                });
+            }
+
+            function loadBundles(bundleList) {
+                return loader.loadBundles(bundleList);
+            }
+
+            return {
+                runApplication: function (bundleList) {
+                    return loadBundles()
+                        .then(resolveExtensions)
+                        .then(registerExtensions)
+                        .then(bootstrapApplication);
+                }
+
+            };
+        }
+
+        return FrameworkInitializer;
+    }
+);