send a push notification if thread is started by a user
added label startOfThreadManual
new lib stringUtils
 different notification id based on room id, improved  notification title and message
remove guest prefix
Merge branch 'master' into push-notification-new-thread
added collapse_key = text.to
added platform to the url
set manualThreaded label if thread is selected by user manually
Merge pull request #376 from scrollback/push-notification-new-thread

Push notification