Added is_production to define sentry environment
Removed as much jQuery as possible
Added public_sentry_dsn application_settings helper method
Use URI module instead of regex for public dsn
Removed raven-vue and load raven on if sentry is enabled
Add load_script spec
added raven_config spec
added class_spec_helper and tests
added sentry_helper spec
added feature spec
Winnie Hellmann