Polymer CSS (css level 4 features) is causing csso problems

Skip it for now since polymer vulcanize already gives us wins.

* Delete ancient ember version

* Rename ember-cli example to emberjs

* Update image min dep

* Use vinyl fs directly for symlink fix

Fixes #1635

This will prevent invalid deploys when we encounter errors instead of a
partial complete deploy.

ref #1635

Update to Ember 2.6

* tests: cache node_modules

Move chrome to snapshots

* tests: Bump selenium version

* tests: Bump drool to v0.4.0

* tests: Remove chromedriver download

* test: Remove direct logs call.

Compiling as downloaded (with `tsc -p js/`) yields the following error:
```
js/app.tsx(12,27): error TS2307: Cannot find module './TodoModel'.
```

Update todomvc-aurelia 0.2.0 (using Aurelia 1.0.0.beta-1)

Fix TypeError: webdriver.WebDriver.Logs is not a function (#1605)

Webdriver logs in actual version of selenium should never be instantiated directly:
https://github.com/SeleniumHQ/selenium/blob/fa5ac92b451cff497e686d8e1e67c9c3101440a3/javascript/node/selenium-webdriver/lib/webdriver.js#L1429-L1432

But drool still uses selenium 2.46.1:
https://github.com/samccone/drool/commit/3770a157d218e6ea27ef9fd2e78f58105375fca0

So the fast fix is the old version of selenium.

Fixes #1605.

Do not exclude es6 example from lint

Updating the Marionette, Chaplin Comparision Link

since 
https://github.com/tastejs/todomvc/pull/1567

We can now handle es6 :)

Vanilla ES6, take 2

add Code of Conduct

adapted from http://contributor-covenant.org

updates all components to latest releases (Aurelia 1.0.0.beta, todomvc-app-css 2.0.4, todomvc-common 1.0.2, ...) and re-bundled everything

Close #1577

- Update sourcemap
- AngularJS upgrade to 1.4
- app-css update

This removes the need to reference a DOM element from the component

 - No implicit any, ensure everything is typed
 - Using private access modifier
 - Property getter / setters

Removing store.js (+1 squashed commit)
Squashed commits:
[0f39fb8] Removed dependency on node-uuid

Backbone example: add id attr to input

Correcting asynchronous testing

removes unnecessary .then() chaining in test.js as selenium-webdriver already queues calls internally

fixed confusing inverted use of idSelector variable

promisified all tests

promisified test.launchBrowser() and global test hooks

promisified test.closeBrowser()

promisified test.createStandardItems()

🛀 streamlined testOps to always return the promise and flattened out the thens

fixed testOps.assertClearCompleteButtonText() to wait for visible clear-complete button before asserting

fixed testOps.assertClearCompleteButtonIsVisible() to lazy wait for visible clear-complete button

renamed testOps.assertFocussedElementId() to .assertFocussedElement() and streamlined code

fixed page.clickMarkAllCompletedCheckBox() to return inner promise

fixed page.enterItem() to return the promise and flattened out the thens

renamed page.getFocussedElementName() with .getFocussedElementIdOrClass()

fixed page.ensureAppIsVisible() to wait for 'new-todo' element instead of 'main' as some frameworks build the contents after DOM-ready

fixed page.clickClearCompleteButton() to wait for actual button to display before clicking

extracted page.waitForVisibleElement() helper function

Sjs/test workup