AAdding a bit of doc for the API

apps/rp/api/views.py

@@ -19,6 +19,16 @@ class ArticleViewSet(ArticleMixin, ArticleFilterMixin, viewsets.ModelViewSet):
     The RequestBody is only needed for the create, update and partial_update
     functions.
 
+    You can add query parameters to do some filtering, Those are :
+        q="search terms" # to do a plaintext search into the title and extract
+                         # of articles
+        archive="true|[false]|both" # to filter on the archive flag or to
+                                    # disable filtering on this flag.
+        speak="true|false|[both]" # to filter on the speak flag, or to disable
+                                  # filtering on this flag.
+        quote="true|false|[both]" # to filter on the quote flag, or to disable
+                                  # filtering on this flag.
+
     list:
     List all known articles in database.