Change notifier interface, add silencing notifier
Change notifier interface, add silencing notifier

prometheus/alertmanager,tyrken/alertmanager,novilabs/alertmanager,MonsantoCo/alertmanager,tyrken/alertmanager,GoogleCloudPlatform/alertmanager,prometheus/alertmanager,sarathsp06/alertmanager,tbouvet/alertmanager,Aloomaio/alertmanager,Aloomaio/alertmanager,Kellel/alertmanager,Kellel/alertmanager,joehandzik/alertmanager,brancz/alertmanager,Kellel/alertmanager,pdf/alertmanager,sarathsp06/alertmanager,prometheus/alertmanager,joehandzik/alertmanager,brancz/alertmanager,novilabs/alertmanager,tinytub/alertmanager,novilabs/alertmanager,tyrken/alertmanager,novilabs/alertmanager,ericgerling/alertmanager,tbouvet/alertmanager,brunoqc/alertmanager,tinytub/alertmanager,brunoqc/alertmanager,prometheus/alertmanager,brunoqc/alertmanager,brunoqc/alertmanager,tbouvet/alertmanager,ericgerling/alertmanager,ericgerling/alertmanager,GoogleCloudPlatform/alertmanager,pdf/alertmanager,MonsantoCo/alertmanager,GoogleCloudPlatform/alertmanager,Aloomaio/alertmanager,GoogleCloudPlatform/alertmanager,pdf/alertmanager,joehandzik/alertmanager,tinytub/alertmanager,sarathsp06/alertmanager,brancz/alertmanager,MonsantoCo/alertmanager,pdf/alertmanager,brancz/alertmanager,MonsantoCo/alertmanager,tyrken/alertmanager