Remove duplicated helpers, added "context" variable
app/helpers/form_helper.rb

Transform event/index path to partial and integrated it to index page:
renamed:    app/views/events/index.html.erb -> app/views/events/_index.html.erb
modified:
app/controllers/events_controller.rb
app/controllers/home_controller.rb
app/views/home/index.html.erb

adjusted test to check if on root page: spec/features/events_spec.rb