CBLT-178:  add icon to s3 page

Change-Id: Ia53fed805bf7c4a8a9c0de9dfcdd0ac016046f96
Reviewed-on: http://review.couchbase.org/39612
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>