Create alarm_mappings table
Have validations groups together
Add alarm mapping model
Add has_many :through associations
Add dependent: :destroy to mapping association
Remove belongs_to :expected_event for Alarm
Remove presence validation for Alarm#expected_event
Pass expected event to mailer
Pass expected event to mailer
Also remove validation from spec
Remove nested routing for alarms
Fix alarms#index action
Fix alarms#show action
Fix alarms#run action
Finalize alarms controller routing refactoring
WIP: alarms#run actually doesn't make sense here anymore
Add alarms to main nav
Qualify sort column
Fix old path
Filter by expected_event_id