Add descriptions to the fields as well

Author: danpalmer

graphene/relay/connection.py

@@ -88,8 +88,22 @@ class EdgeMeta:
         _meta.node = node
         _meta.fields = OrderedDict(
             [
-                ("page_info", Field(PageInfo, name="pageInfo", required=True)),
-                ("edges", Field(NonNull(List(edge)))),
+                (
+                    "page_info",
+                    Field(
+                        PageInfo,
+                        name="pageInfo",
+                        required=True,
+                        description="Pagination data for this connection.",
+                    ),
+                ),
+                (
+                    "edges",
+                    Field(
+                        NonNull(List(edge)),
+                        description="Contains the nodes in this connection.",
+                    ),
+                ),
             ]
         )
         return super(Connection, cls).__init_subclass_with_meta__(