=====
Changes to reflect Centrifuge 0.8.0 changes
* `project_id` renamed to `key` when creating `Client` instance
* `secret_key` renamed to `secret` when creating `Client` instance
* rename `CENTRIFUGE_PROJECT_ID` setting to `CENTRIFUGE_PROJECT_KEY`
How to migrate:
~~~~~~~~~~~~~~~
* change kwargs names if you use `Client` from `adjacent`
* change `CENTRIFUGE_PROJECT_ID` setting name to `CENTRIFUGE_PROJECT_KEY`