Move helpers back to original directory

app/controllers/application_controller.rb

app/controllers/oauth/applications_controller.rb

app/controllers/oauth/authorized_applications_controller.rb

app/controllers/projects/network_controller.rb

app/controllers/projects/refs_controller.rb

app/controllers/projects/wikis_controller.rb

app/controllers/search_controller.rb

app/helpers/appearances_helper.rb

app/helpers/application_helper.rb

app/helpers/application_settings_helper.rb

app/helpers/auth_helper.rb

app/helpers/blob_helper.rb

app/helpers/branches_helper.rb

app/helpers/broadcast_messages_helper.rb

app/helpers/commits_helper.rb

app/helpers/compare_helper.rb

app/helpers/dashboard_helper.rb

app/helpers/diff_helper.rb

app/helpers/emails_helper.rb

app/helpers/events_helper.rb