Update Angular2 dep. to support Betas until RC1 (angular#136)

chore(dependencies): Set Angular 2 version to range from beta-14 to rc-1

Author: gamebox

package.json

@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/angular/indy#readme",
   "dependencies": {
-    "angular2": "2.0.0-beta.14",
+    "angular2": ">=2.0.0-beta.14 <2.0.0-rc.1",
     "firebase": "2.4.2",
     "rxjs": "5.0.0-beta.2"
   },