CMO-4203 update the push sample app to GoogleCloudMessaging API
Fix review indication
add google paly service lib
Fix review indication
Handle npe as ProgressDialogFragment sometimes returns null
Merged in shapan_ecs/androidpushsample-prv/CMO-4203-bb (pull request #15)

GCMCloudMessaging Impl.
Merge pull request #5 from sbin/gcm-cloud-msg

update the push sample app to GoogleCloudMessaging API