added docs for enabling sentry.io error-capturing
added docs for enabling sentry.io error-capturing

ilios/ilios,dartajax/ilios,Trott/ilios,thecoolestguy/ilios,stopfstedt/ilios,thecoolestguy/ilios,stopfstedt/ilios,ilios/ilios,dartajax/ilios,Trott/ilios