Add the _form for views/alarm_triggers

We had the form before in the index but due to "DRY" moved it into the _form folder.
Generate Migration for AlarmTriggers

Using the command "rails generate migration CreateAlarmTriggers title:string type:string action:string", and then "rake db:migrate"
Change routes

We included the resources :alarm_triggers. As good ol' Hartl puts it: "adding resources :users to the routes.rb file automatically ensures that our Rails application responds to the RESTful URIs"