Produce .d.ts files from our typescript compilation.

Deliver them into our npm module output so users can consume them directly.

Fixes #3082

modules/angular2/src/core/render/dom/events/hammer_gestures.ts

@@ -1,5 +1,3 @@
-/// <reference path="../../../../../typings/hammerjs/hammerjs.d.ts"/>
-
 import {HammerGesturesPluginCommon} from './hammer_common';
 import {isPresent} from 'angular2/src/core/facade/lang';
 import {BaseException, WrappedException} from 'angular2/src/core/facade/exceptions';

modules/angular2/src/core/render/dom/events/key_events.ts

@@ -90,7 +90,7 @@ export class KeyEventsPlugin extends EventManagerPlugin {
     return fullKey;
   }
 
-  static eventCallback(element: HTMLElement, fullKey: any, handler: (Event) => any, zone: NgZone):
+  static eventCallback(element: HTMLElement, fullKey: any, handler: (e: Event) => any, zone: NgZone):
       (event: KeyboardEvent) => void {
     return (event) => {
       if (StringWrapper.equals(KeyEventsPlugin.getEventFullKey(event), fullKey)) {