Cast req to proper TL object
Call NotificationSenderTask after sending message
Added NotificationSenderTask class
Added RequestTask class
Run AsyncTask with executeOnExecutor
Run AsyncTasks on UI thread
Set httpclient defaults
Use Utilities.RunOnUIThread instead of new Handler
Run notifications on  UI thread in group chat
Merge pull request #1 from Aniways/add-ios-push-notifications

Add ios push notifications