Added dart:html recipes for dartlang

Review URL: https://chromiumcodereview.appspot.com//14622014
update style guide

BUG=

Review URL: https://chromiumcodereview.appspot.com//14244003
new support page

staged at http://new-support-page.dart-lang.appspot.com/support/

BUG=

Review URL: https://chromiumcodereview.appspot.com//14697025
Refresh homepage, doc index.

Review URL: https://chromiumcodereview.appspot.com/14573011
Add Dart Tips link to Presentations page.

Review URL: https://chromiumcodereview.appspot.com/15047009
Move the headlines from custom CSS to BS well.
Merge pull request #65 from MarkBennett/simple-hero-unit-styling

Move the headlines from custom CSS to BS well.
add google i/o codelab to dartlang.org

I'll delete it from github, which doesn't treat PDF very nicely. I'll also update the Doc to point to this new location. (Unfortunately, I can't change what the goo.gl URL points to.)

Staged at:
http://codelab.dart-lang.appspot.com/
http://codelab.dart-lang.appspot.com/codelabs/google-io-2013.pdf

Review URL: https://chromiumcodereview.appspot.com/15479002
remove old codelab

BUG=

Review URL: https://chromiumcodereview.appspot.com//15512002
fix doc about data-style (fix https://github.com/dart-lang/web-ui/issues/500)

R=jmesserly@google.com

Review URL: https://chromiumcodereview.appspot.com//15528002
added the link to Language Specification back to the menu
Merge pull request #67 from Ladicek/language-spec-in-the-menu

added the link to Language Specification back to the menu
- Redirect for /docs/editor/troubleshoot.html
- Spec URL tweak (in nav menu)
- Mac continuous build -> 64 bit

Staged at:
http://buglets.dart-lang.appspot.com/docs/editor/troubleshoot.html
http://buglets.dart-lang.appspot.com/tools/editor/#download

Review URL: https://chromiumcodereview.appspot.com/15366005
clean up observables article

staged at http://observable-article.dart-lang.appspot.com/web-ui/observables/

Review URL: https://chromiumcodereview.appspot.com//15631002
Updated due to changes in mirror API
visa versa => vice versa

http://en.wikipedia.org/wiki/Vice-versa#vice_versa
Merge pull request #69 from tosh/patch-1

visa versa => vice versa
Merge pull request #68 from gbracha/patch-1

Updated due to changes in mirror API
fix pagespeed config

BUG=

Review URL: https://chromiumcodereview.appspot.com//15727003
Reflection article: add test code, match the article to the test code

Also: fix the build by removing a stray file.

I'll submit this right away, but please take a look when you can, Gilad.

Review URL: https://chromiumcodereview.appspot.com/15920003