Switch Angular dependency to beta 1.

Author: hdeshev

package.json

@@ -14,7 +14,7 @@
   },
   "scripts": {},
   "dependencies": {
-      "angular2": "2.0.0-beta.0",
+      "angular2": "2.0.0-beta.1",
       "parse5": "1.4.2",
       "punycode": "1.3.2",
       "querystring": "0.2.0",