More properties, upgraded deps, basic tests and reworked exampes

[maxwondercorn]

This pr has added basic tests to the project. More tests for c3 events and c3 api should be added

• add c3 chart property for api access
• add c3 title property
• c3 and d3 latest versions
• document unloadDataBeforeChange
• Added basic rendering tests- tests pass down to ember v2.4
• reworked dummy app examples - removed jsoneditor
• upgrade from ember 3.1 to 3.3
• npm import converted from ember-cli-cjs-transform to ember-auto-import (new standard)
• yarn.lock
• updated readme