feat(Directive): convert properties to an array

fixes #2013

BREAKING CHANGE:

Before

    @Directive(properties: {
      'sameName': 'sameName',
      'directiveProp': 'elProp | pipe'
    })

After

    @Directive(properties: [
      'sameName',
      'directiveProp: elProp | pipe'
    ])

modules/angular2/src/router/router_link.js

@@ -31,10 +31,10 @@ import {Location} from './location';
  */
 @Directive({
   selector: '[router-link]',
-  properties: {
-    'route': 'routerLink',
-    'params': 'routerParams'
-  },
+  properties: [
+    'route: routerLink',
+    'params: routerParams'
+  ],
   lifecycle: [onAllChangesDone]
 })
 export class RouterLink {