Improved readme

README.md

@@ -74,16 +74,14 @@ of the answers:
 ![Image-only poll](doc_img/img_poll.png)
 
 Please note that using only images is not accessible as Poll XBlock does not provide means for specifying alternate
-text for images.
+text for images. Instead use images *and* texts:
+
+![Image and Label label poll](doc_img/img_and_label_poll.png)
 
 This poll also contains a feedback section, which is enhanced with Markdown:
 
 ![Image-only poll results](doc_img/img_poll_result.png)
 
-Polls may also have images and with text.
-
-![Image and Label label poll](doc_img/img_and_label_poll.png)
-
 Or they may have a mix of both.
 
 ![Mixed label poll](doc_img/poll_mixed.png)