* fix 'Testing with Chai' 404 error
* Remove service worker and unregister old workers from clients
* Fix block name in QA and Chai intro
* Move the map to the index page
* Split test commands, have travis run format on test
* Only expand the first block
* Remove some margin from p tags on the index page
* Learn -> Curriculum link in header
* UI Fixes
* Use webpack plugin to destroy sercive worker
* Add spinner for unknown user state
* Fix map placement
* Fix vcurriculum button clicks
