6.2.0
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* Return an HTTP 401 for XHRs that aren't logged in

6.1.3
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* add redirect_uri which is now required
* fix login again with different shop

6.0.0
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* Re-written as a proper rails engine
* New modular generators
* generates embedded apps by default
* can bootstrap your app with a standard shop table and model
* code now lives as concerns in the engine which are included in your controllers
  feel free to override anything you need in your app

Historical
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* re-styled with Twitter Bootstrap css framework and updated docs [warren]
* Require shopify_api gem via proper railtie setup [willem]
* Don't require shopify.yml when using environment variables [cody]
* Renamed instances of current_shop to shop_session to maintain logic
* Replace old LoginController with a RESTful SessionsController