Upgrade to ember-cli 3.5.0 and spin.js 4.0.0, eliminate bower dependency.
BREAKING: spinner color will no longer default to the parent elements text color, but will instead default to #333.
Adds the scale property, which can be used to scale the overall size of the spinner (thanks @mnowik!).
Upgraded to ember-cli 0.2.2 and Ember 1.11. Addon no longer relies on Ember prototype extensions.