Add dynamodb stream to output (#10)

Author: darend

outputs.tf

@@ -13,3 +13,11 @@ output "table_arn" {
 output "global_secondary_index_names" {
   value = ["${null_resource.global_secondary_indexes.*.triggers.name}"]
 }
+
+output "table_stream_arn" {
+  value = "${aws_dynamodb_table.default.stream_arn}"
+}
+
+output "table_stream_label" {
+  value = "${aws_dynamodb_table.default.stream_label}"
+}