Upgrade to React 0.4, fully compliant with specs

Realtime: Addition for Firebase as a realtime framework

Marionette - Changes for issue #642 

Fixed issue #642
Couple of minor bug fixes

Update Brunch with Chaplin.

1. Add Bower integration. Since Brunch automatically concatenates all Bower stuff, we don’t need bower_components in repository (added to .gitignore, except of todomvc-common).
2. Update Brunch to 1.7.
    * Added automatic source maps generation, source maps are in repo too.
3. Update Chaplin to 0.10.
    * Remove `chaplin` module, switch to global variable.
    * Switch to new declarative events format.
    * Switch to controller compositions instead of static controllers.
    * Remove `application` since Chaplin now has this functionality by default.

refactor to reflect logic on line 62

Remove ternary expressions

A more readable and scalable approach

- Compilant with coding style.
- Removed app.css. No need anymore since we freed id.
- Render info footer separately (specs).
- Tweak footer to make it pass jshint when compiled:
  - {''} after 'left'.
  - {''} around `clear completed`.
  - Breaking style for footer clearButton, `>` on the same line.
- Rename cx and put it in Utils.
- Routing with director.
- Change some keyUp to keyDown (specs).
- Strip form tags (specs? Referred to the stable ones).
- Trim after editing item.
- Manually autofocus (attribute not supported in ie9).
- Input focus now triggers as a callback (because of batch rendering).
- Controlled input.
- Gutter at 80.
- Class `completed` trim whitespace.
- Remove bind.

Update index.html

Updated YUI seed file

Refine selector by providing a context

Fixing #617

angularjs: add escape behavior

SAPUI5: bug fixes (tab preserves todo changes, enter always finishes editing)

SAPUI5: remove unneeded libraries from bootstrap

If the script loader is triggered after loading the stylesheet, some of our
overrides don't apply.