don't block on dealing with StateStream

some clients don't use it. we block indefinitely if we don't allow for it to
not be used.

client.go

@@ -163,7 +163,12 @@ func (c *Client) Play() error {
 		if err != nil {
 			return errors.New(fmt.Sprintf("%s: Connection likely lost: %s", c.Name, err))
 		}
-		c.StateStream <- bs
+
+		select {
+		case c.StateStream <- bs:
+		default:
+		}
+
 		err = c.enc.Encode(c.Update(bs))
 		if err != nil {
 			return err