tags added to s3_bucket docs

website/source/docs/providers/aws/r/s3_bucket.html.markdown

@@ -16,6 +16,11 @@ Provides a S3 bucket resource.
 resource "aws_s3_bucket" "b" {
     bucket = "my_tf_test_bucket"
     acl = "private"
+
+    tags {
+        Name = "My bucket"
+        Environment = "Dev"
+    }
 }
 ```
 
@@ -25,6 +30,7 @@ The following arguments are supported:
 
 * `bucket` - (Required) The name of the bucket.
 * `acl` - (Optional) The canned ACL to apply. Defaults to "private".
+* `tags` - (Optional) A mapping of tags to assign to the bucket.
 
 ## Attributes Reference