regenerate the book, hide remarks

Review URL: https://chromiumcodereview.appspot.com/64793005
added popups to front page code snippets

BUG=

Review URL: https://chromiumcodereview.appspot.com/61693004
php workaround for restrictive hosts?
Merge pull request #223 from ocupop/dart-1.0

php workaround for restrictive hosts?
Merge branch 'dart-1.0' of github.com:dart-lang/dartlang.org into dart-1