Explain Code of Conduct

Add a short explanation to coach and attendee forms
While it's technically working correctly, I think it might be confusing to have this styling in this file. The styling is not particularly related to AttendeeApplications but also used in CoachApplications. So  I suggest to move it into a different file. 
For example, we could create a registrations.css.scss -  CoachApplicationsController and AttendeeApplicationsController both inherit from RegistrationsController. But I'm also fine with something even more generic, if you prefer that.