added information about how to create a Notifier
added information about how to create a Notifier

druid628/Sismo,druid628/Sismo,arduanov/Sismo,gencer/Sismo,georgiana-gligor/Sismo,FriendsOfPHP/Sismo,lyrixx/Sismo,lyrixx/Sismo,arduanov/Sismo,FriendsOfPHP/Sismo,georgiana-gligor/Sismo,gencer/Sismo