Modify index pages of MultiResolution, Wiktionary, and WiktionarySimple samples, to point to new screenshots. Also some minor cleanup.
diff --git a/samples/MultiResolution/_index.html b/samples/MultiResolution/_index.html
index 73089ae..825ea4d 100644
--- a/samples/MultiResolution/_index.html
+++ b/samples/MultiResolution/_index.html
@@ -17,4 +17,4 @@
 </ul>
 </p>
 
-<img alt="" src="../images/sample_multires.png"/>
+<img alt="" src="../images/MultiResolution.png"/>