fixes #204 - UNKNOWN -> OK (brief) -> [any problem state] alert is masked by notification interval
logging tweaks
fixes #203 - no recovery for unknown for contact with notification rules
add tests for #203 and #204
remove log output from test
update changelog
create a general notification rule for a contact if none exists
Merge pull request #205 from ali-graham/199_generate_general_notification_rule

create a general notification rule for a contact if none exists