Fix r.js minification for angular_require

- Correctly wrap todoFocus directive to work after minification.
- Require angular dependency in app.js

Fixing YUI example. Fixes #329

Removing dead supported browsers link

Dart app: ENTER keyCode for fixing issue #320

Updating example to use Dojo 1.8 and new MVC features

- Single quotes
- Tabs
- Code style
- Remove all except jQuery one from site
- etc

CanJS TodoMVC example

- Update dependencies
- Improve readme
- Convert to tabs
- Code style
- CSS simplification
- Quotes
- and more

Add indication of routing support for labs apps, temp fix for Chrome ::after issues (crbug 104991), break overflow for knockout line into two.

Reason: https://github.com/addyosmani/todomvc/issues/65#issuecomment-9794360

Add KnockoutJS app using ClassBindingProvider to Labs

Implements Ryan Niemeyer's classBindingProvider in the default
KnockoutJS TodoMVC app.

Fixes #304

Because no one seems to have it in their global gitignore...