Merge pull request #145 from Kinto/document-bucket-option

Fixes #120 - Documented bucket option.

docs/api.md

@@ -12,6 +12,7 @@ const db = new Kinto(options);
 - `headers`: The default headers to pass for every HTTP request performed to the Kinto server (eg. `{"Authorization": "Basic bWF0Og=="}`);
 - `adapter`: The persistence layer adapter to use for saving data locally (default: `Kinto.adapters.IDB`); alternatively, a `Kinto.adapters.LocalStorage` adapter is also provided; last, if you plan on writing your own adapter, you can read more about how to do so in the [Extending Kinto.js](extending.md) section.
 - `requestMode`: The HTTP [CORS](https://fetch.spec.whatwg.org/#concept-request-mode) mode. Default: `cors`.
+- `bucket`: The [Kinto bucket name](http://kinto.readthedocs.org/en/latest/api/buckets.html) to use for remote syncing (default: "default").
 - `dbPrefix`: The prefix for the local database name (default: `""`). Use this option to isolate different specific databases, eg. for storing distinct users data.
 
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