added limit-offset pagination to endpoints

README.md

@@ -59,6 +59,18 @@ To load initial set of tags: `python manage.py addtaxonomy`
 
 ## Endpoints
 
+
+## Pagination
+
+By default a `LimitOffsetPagination` pagination is enabled
+
+Examples: `http://127.0.0.1:8000/api/v1/products/?limit=10&offset=0`
+
+The response data has the following keyspayload:
+```
+dict_keys(['count', 'next', 'previous', 'results'])
+```
+
 ### User Management
 
 Creation: