emberjs/data — pull request #1775 by bmac (2014-03-02 14:30:28+00:00)
Title: Use the ApplicationAdapter property instead of creating a custom Store

just to create a custom adapter.

The Transition guide for ember data make it seem like extending `DS.Store` to create a custom adapter is the old ember data .13 way of doing things.
https://github.com/emberjs/data/blob/master/TRANSITION.md#adapters