Update requirements
Move old stuff to old/ folder
Update contribution guidelines
Update ignore patterns
Add new config files
Update license
Brute import of old app to ember-cli
Get the build to work

* JSHint corrections
* Add missing import statements
* Use new config object
Add mocking server for sentences
Get tests to work
JSHint correction
Add Firefox to test browsers, rename Chrome to Chromium
Use NoneLocation for tests, with still one failure

Testing with timers will be converted to Sinon.JS, which should solve
the failure we have here.
Add sinon to test environment
Move tests to a separate location to re-edit them one by one
Merge branch 'ember-cli'