fix(types): Add StringMap type

modules/angular2/src/core/compiler/template_loader.js

@@ -1,6 +1,6 @@
 import {isBlank, isPresent, BaseException, stringify} from 'angular2/src/facade/lang';
 import {DOM, Element} from 'angular2/src/facade/dom';
-import {StringMapWrapper} from 'angular2/src/facade/collection';
+import {StringMapWrapper, StringMap} from 'angular2/src/facade/collection';
 
 import {XHR} from './xhr/xhr';
 
@@ -11,7 +11,7 @@ import {Template} from 'angular2/src/core/annotations/template';
  */
 export class TemplateLoader {
   _xhr: XHR;
-  _cache;
+  _cache: StringMap;
 
   constructor(xhr: XHR) {
     this._xhr = xhr;

modules/angular2/src/facade/collection.dart

@@ -57,7 +57,6 @@ class MapWrapper {
   static Iterable values(Map m) => m.values;
 }
 
-// TODO: how to export StringMap=Map as a type?
 class StringMapWrapper {
   static HashMap create() => new HashMap();
   static bool contains(Map map, key) => map.containsKey(key);

modules/angular2/src/facade/collection.es6

@@ -3,6 +3,7 @@ import {int, isJsObject, global} from 'angular2/src/facade/lang';
 export var List = global.Array;
 export var Map = global.Map;
 export var Set = global.Set;
+export var StringMap = global.Object;
 
 export class MapWrapper {
   static create():Map { return new Map(); }
@@ -29,7 +30,6 @@ export class MapWrapper {
   static values(m) { return m.values(); }
 }
 
-// TODO: cannot export StringMap as a type as Dart does not support renaming types...
 /**
  * Wraps Javascript Objects
  */

modules/angular2/src/forms/model.js

@@ -1,4 +1,4 @@
-import {StringMapWrapper} from 'angular2/src/facade/collection';
+import {StringMapWrapper, StringMap} from 'angular2/src/facade/collection';
 
 export class Control {
   value:any;
@@ -9,9 +9,9 @@ export class Control {
 }
 
 export class ControlGroup {
-  controls;
+  controls: StringMap;
 
-  constructor(controls) {
+  constructor(controls:StringMap) {
     this.controls = controls;
   }