message: fix: Report fatal errors as indeed "fatal"
diff: @@ -161,7 +161,7 @@ extend(Raven.prototype, {
  // also we want to make sure we don't go recursion crazy if more errors happen after this one
  firstError = err;
  caughtFirstError = true;
  - self.captureException(err, function(sendErr, eventId) {
  + self.captureException(err, {level: 'fatal'}, function(sendErr, eventId) {
  if (!calledFatalError) {
  calledFatalError = true;
  self.onFatalError(err, sendErr, eventId);
  