v1.0.0-alpha.9

Closed issues:

• Publish alpha 8 #171
• Publish v1.0.0-alpha.8 to NPM Repository #168
• didInitAttrs and Ember.k DEPRECATION warnings for ember 2.13.1 #150

Merged pull requests:

• Fix test that fails in recent Firefox & Safari versions under some circumstances #174 (lukemelia)
• Remove arrayObserver when the component is destroyed #173 (pieter-v)
• Upgrade layout-bin-packer #172 (alexlafroscia)