chore(package): bump version to alpha.9
chore(package): bump version to alpha.9

Included in this release:
 * Upgrade to Angular2 beta.7, rxjs 5 beta.2, zone.js 0.15.5, and Firebase 2.4.1
 * Remove FirebaseList provider-based API (in favor of AngularFire service)
 * Automatically unwrap values in list returned from AngularFire.list()

maneesht/angularfire2,angular/angularfire,angular/angularfire,angular/angularfire,maneesht/angularfire2,angular/angularfire,maneesht/angularfire2,maneesht/angularfire2