[CLOUDSRV-1409] / [CLOUDSRV-1532] / [CLOUDSRV-1930] / [CLOUDSRV-1949]

[CLOUDSRV-1409] CloudPush: Push Notification causing Application Restart
[CLOUDSRV-1532] Multiple push notifications should better handled
[CLOUDSRV-1930] Update document for newly added feature of Titanium.CloudPush
[CLOUDSRV-1949] ti.cloudpush: Background - Push notification focusing app to foreground crashes app