on.click.add() ==> onClick.listen() (dart:html lib changes)
Merge pull request #33 from devoncarew/master

tweaks to the dart sample on the front page
don't use playlist for dart tip embeds

BUG=

Review URL: https://chromiumcodereview.appspot.com//12185016
escape {{ }} in markdown
Making the code highlight consistent on wrongletters
Merge pull request #34 from financeCoding/master

fixed escape for {{ }} in markdown
book update: map -> mappedBy; html event handling and httprequest changes

The main changes are here:
http://book.dart-lang.appspot.com/docs/dart-up-and-running/contents/ch03.html#ch03-httprequest

Also see the summary of updates, so far:
http://book.dart-lang.appspot.com/docs/dart-up-and-running/contents/preface.html#preface-updates

Ignore the changes to contents/index.html. That file is mostly hidden, and the changes appear to be spurious (maybe due to a remote stylesheet adding links where none used to be before).

Review URL: https://chromiumcodereview.appspot.com/12226066