Add example of query param usage (#53)

* Add example of query params and overview

* Split into its own example

* Fix typo

* Don't change formatting

* Fix language

Author: Ian Boynton

README.rst

@@ -61,6 +61,15 @@ JW Platform API library will raise exception inherited from ``jwplatform.errors.
 
 For the complete list of available exception see `jwplatform/errors.py`_ file.
 
+List calls allow for (optional) querying and filtering. This can be done by passing the query parameters as a dict to the `query_params` keyword argument on list calls:
+
+.. code-block:: python
+  response = jwplatform_client.Media.list(site_id='SITE_ID', query_params={"page": 1, "page_length": 10, "sort": "title:asc", "q": "external_id: abcdefgh"})
+
+All query parameters are optional. `page`, `page_length`, and `sort` parameters default to 1, 10, and "created:dsc", respectively. The `q` parameter allows for filtering on different
+attributes and may allow for AND/OR querying depending on the resource. For full documentation on the query syntax and endpoint specific details please refer to developer.jwplayer.com.
+
+
 Source Code
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