Set max-width of the text in the examples

git-svn-id: https://flot.googlecode.com/svn/trunk@156 1e0a6537-2640-0410-bfb7-f154510ff394

examples/layout.css

@@ -2,4 +2,5 @@ body {
   font-family: sans-serif;
   font-size: 16px;
   margin: 50px;
+  max-width: 800px;
 }