#118 API pagination

* adds pagination and related parameters to GET apis
* updates api GET test

api/tests/v1/get/test_api_get.py

@@ -36,7 +36,12 @@ class APIV1GetTestCase(BaseAPIV1TestCase):
         """
         response = self._run_get_request(url)
         content = json.loads(response.content)
-        geojson = content[str(obj.id)]
+        self.assertIn("rpp", content)
+        self.assertIn("p", content)
+        self.assertIn("next", content)
+        self.assertIn("results", content)
+        paginated_content = content["results"]
+        geojson = paginated_content[str(obj.id)]
         self.assertEqual(response.status_code, 200, msg=response.content)
         return geojson