Doc change: edits and fixes to data binding guide.

Change-Id: Iaef989bd48a99294e2032656653e71ef93313687
diff --git a/docs/html/preview/samples.jd b/docs/html/preview/samples.jd
index 29b9e2a..21d4215 100644
--- a/docs/html/preview/samples.jd
+++ b/docs/html/preview/samples.jd
@@ -1,5 +1,5 @@
 page.title=Samples
-page.image=images/cards/card-samples_16-9_2x.png
+page.image=images/cards/samples-new_2x.png
 @jd:body
 
 <p>